Merge remote-tracking branch 'upstream/master'

1 files changed, 5617 insertions, 8549 deletions

diff --git a/python/src/_cdec.cpp b/python/src/_cdec.cpp
index 4b950f01..ae36b773 100644
--- a/python/src/_cdec.cpp
+++ b/python/src/_cdec.cpp
@@ -1,6 +1,18 @@
-/* Generated by Cython 0.18 on Tue Apr 23 18:41:37 2013 */
+/* Generated by Cython 0.19.1 on Sun Jun  2 14:47:49 2013 */
 
 #define PY_SSIZE_T_CLEAN
+#ifndef CYTHON_USE_PYLONG_INTERNALS
+#ifdef PYLONG_BITS_IN_DIGIT
+#define CYTHON_USE_PYLONG_INTERNALS 0
+#else
+#include "pyconfig.h"
+#ifdef PYLONG_BITS_IN_DIGIT
+#define CYTHON_USE_PYLONG_INTERNALS 1
+#else
+#define CYTHON_USE_PYLONG_INTERNALS 0
+#endif
+#endif
+#endif
 #include "Python.h"
 #ifndef Py_PYTHON_H
     #error Python headers needed to compile C extensions, please install development version of Python.
@@ -116,6 +128,9 @@
 #if (PY_VERSION_HEX < 0x02060000) || (PY_MAJOR_VERSION >= 3)
   #define Py_TPFLAGS_HAVE_NEWBUFFER 0
 #endif
+#if PY_VERSION_HEX < 0x02060000
+  #define Py_TPFLAGS_HAVE_VERSION_TAG 0
+#endif
 #if PY_VERSION_HEX > 0x03030000 && defined(PyUnicode_KIND)
   #define CYTHON_PEP393_ENABLED 1
   #define __Pyx_PyUnicode_READY(op)       (likely(PyUnicode_IS_READY(op)) ? \
@@ -155,6 +170,14 @@
   #define PyBytes_Concat               PyString_Concat
   #define PyBytes_ConcatAndDel         PyString_ConcatAndDel
 #endif
+#if PY_MAJOR_VERSION >= 3
+  #define __Pyx_PyBaseString_Check(obj) PyUnicode_Check(obj)
+  #define __Pyx_PyBaseString_CheckExact(obj) PyUnicode_CheckExact(obj)
+#else
+  #define __Pyx_PyBaseString_Check(obj) (PyString_CheckExact(obj) || PyUnicode_CheckExact(obj) || \
+                                         PyString_Check(obj) || PyUnicode_Check(obj))
+  #define __Pyx_PyBaseString_CheckExact(obj) (Py_TYPE(obj) == &PyBaseString_Type)
+#endif
 #if PY_VERSION_HEX < 0x02060000
   #define PySet_Check(obj)             PyObject_TypeCheck(obj, &PySet_Type)
   #define PyFrozenSet_Check(obj)       PyObject_TypeCheck(obj, &PyFrozenSet_Type)
@@ -227,6 +250,40 @@
   #define __Pyx_NAMESTR(n) (n)
   #define __Pyx_DOCSTR(n)  (n)
 #endif
+#ifndef CYTHON_INLINE
+  #if defined(__GNUC__)
+    #define CYTHON_INLINE __inline__
+  #elif defined(_MSC_VER)
+    #define CYTHON_INLINE __inline
+  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+    #define CYTHON_INLINE inline
+  #else
+    #define CYTHON_INLINE
+  #endif
+#endif
+#ifndef CYTHON_RESTRICT
+  #if defined(__GNUC__)
+    #define CYTHON_RESTRICT __restrict__
+  #elif defined(_MSC_VER)
+    #define CYTHON_RESTRICT __restrict
+  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+    #define CYTHON_RESTRICT restrict
+  #else
+    #define CYTHON_RESTRICT
+  #endif
+#endif
+#ifdef NAN
+#define __PYX_NAN() ((float) NAN)
+#else
+static CYTHON_INLINE float __PYX_NAN() {
+  /* Initialize NaN. The sign is irrelevant, an exponent with all bits 1 and
+   a nonzero mantissa means NaN. If the first bit in the mantissa is 1, it is
+   a quiet NaN. */
+  float value;
+  memset(&value, 0xFF, sizeof(value));
+  return value;
+}
+#endif
 
 
 #if PY_MAJOR_VERSION >= 3
@@ -298,17 +355,6 @@
 #define CYTHON_WITHOUT_ASSERTIONS
 #endif
 
-#ifndef CYTHON_INLINE
-  #if defined(__GNUC__)
-    #define CYTHON_INLINE __inline__
-  #elif defined(_MSC_VER)
-    #define CYTHON_INLINE __inline
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_INLINE inline
-  #else
-    #define CYTHON_INLINE
-  #endif
-#endif
 #ifndef CYTHON_UNUSED
 # if defined(__GNUC__)
 #   if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
@@ -322,10 +368,44 @@
 #   define CYTHON_UNUSED
 # endif
 #endif
-typedef struct {PyObject **p; char *s; const long n; const char* encoding; const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry; /*proto*/
-
-#define __Pyx_PyBytes_FromUString(s) PyBytes_FromString((char*)s)
-#define __Pyx_PyBytes_AsUString(s)   ((unsigned char*) PyBytes_AsString(s))
+typedef struct {PyObject **p; char *s; const Py_ssize_t n; const char* encoding;
+                const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry; /*proto*/
+
+#define __PYX_DEFAULT_STRING_ENCODING_IS_ASCII 0
+#define __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT 0
+#define __PYX_DEFAULT_STRING_ENCODING ""
+#define __Pyx_PyObject_FromString __Pyx_PyBytes_FromString
+#define __Pyx_PyObject_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
+static CYTHON_INLINE char* __Pyx_PyObject_AsString(PyObject*);
+static CYTHON_INLINE char* __Pyx_PyObject_AsStringAndSize(PyObject*, Py_ssize_t* length);
+#define __Pyx_PyBytes_FromString        PyBytes_FromString
+#define __Pyx_PyBytes_FromStringAndSize PyBytes_FromStringAndSize
+static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(char*);
+#if PY_MAJOR_VERSION < 3
+    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
+    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
+#else
+    #define __Pyx_PyStr_FromString        __Pyx_PyUnicode_FromString
+    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyUnicode_FromStringAndSize
+#endif
+#define __Pyx_PyObject_AsUString(s)    ((unsigned char*) __Pyx_PyObject_AsString(s))
+#define __Pyx_PyObject_FromUString(s)  __Pyx_PyObject_FromString((char*)s)
+#define __Pyx_PyBytes_FromUString(s)   __Pyx_PyBytes_FromString((char*)s)
+#define __Pyx_PyStr_FromUString(s)     __Pyx_PyStr_FromString((char*)s)
+#define __Pyx_PyUnicode_FromUString(s) __Pyx_PyUnicode_FromString((char*)s)
+#if PY_MAJOR_VERSION < 3
+static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u)
+{
+    const Py_UNICODE *u_end = u;
+    while (*u_end++) ;
+    return u_end - u - 1;
+}
+#else
+#define __Pyx_Py_UNICODE_strlen Py_UNICODE_strlen
+#endif
+#define __Pyx_PyUnicode_FromUnicode(u)       PyUnicode_FromUnicode(u, __Pyx_Py_UNICODE_strlen(u))
+#define __Pyx_PyUnicode_FromUnicodeAndLength PyUnicode_FromUnicode
+#define __Pyx_PyUnicode_AsUnicode            PyUnicode_AsUnicode
 #define __Pyx_Owned_Py_None(b) (Py_INCREF(Py_None), Py_None)
 #define __Pyx_PyBool_FromLong(b) ((b) ? (Py_INCREF(Py_True), Py_True) : (Py_INCREF(Py_False), Py_False))
 static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject*);
@@ -339,6 +419,78 @@ static CYTHON_INLINE size_t __Pyx_PyInt_AsSize_t(PyObject*);
 #define __pyx_PyFloat_AsDouble(x) PyFloat_AsDouble(x)
 #endif
 #define __pyx_PyFloat_AsFloat(x) ((float) __pyx_PyFloat_AsDouble(x))
+#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
+static int __Pyx_sys_getdefaultencoding_not_ascii;
+static int __Pyx_init_sys_getdefaultencoding_params() {
+    PyObject* sys = NULL;
+    PyObject* default_encoding = NULL;
+    PyObject* ascii_chars_u = NULL;
+    PyObject* ascii_chars_b = NULL;
+    sys = PyImport_ImportModule("sys");
+    if (sys == NULL) goto bad;
+    default_encoding = PyObject_CallMethod(sys, (char*) (const char*) "getdefaultencoding", NULL);
+    if (default_encoding == NULL) goto bad;
+    if (strcmp(PyBytes_AsString(default_encoding), "ascii") == 0) {
+        __Pyx_sys_getdefaultencoding_not_ascii = 0;
+    } else {
+        const char* default_encoding_c = PyBytes_AS_STRING(default_encoding);
+        char ascii_chars[128];
+        int c;
+        for (c = 0; c < 128; c++) {
+            ascii_chars[c] = c;
+        }
+        __Pyx_sys_getdefaultencoding_not_ascii = 1;
+        ascii_chars_u = PyUnicode_DecodeASCII(ascii_chars, 128, NULL);
+        if (ascii_chars_u == NULL) goto bad;
+        ascii_chars_b = PyUnicode_AsEncodedString(ascii_chars_u, default_encoding_c, NULL);
+        if (ascii_chars_b == NULL || strncmp(ascii_chars, PyBytes_AS_STRING(ascii_chars_b), 128) != 0) {
+            PyErr_Format(
+                PyExc_ValueError,
+                "This module compiled with c_string_encoding=ascii, but default encoding '%s' is not a superset of ascii.",
+                default_encoding_c);
+            goto bad;
+        }
+    }
+    Py_XDECREF(sys);
+    Py_XDECREF(default_encoding);
+    Py_XDECREF(ascii_chars_u);
+    Py_XDECREF(ascii_chars_b);
+    return 0;
+bad:
+    Py_XDECREF(sys);
+    Py_XDECREF(default_encoding);
+    Py_XDECREF(ascii_chars_u);
+    Py_XDECREF(ascii_chars_b);
+    return -1;
+}
+#endif
+#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT && PY_MAJOR_VERSION >= 3
+#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_DecodeUTF8(c_str, size, NULL)
+#else
+#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_Decode(c_str, size, __PYX_DEFAULT_STRING_ENCODING, NULL)
+#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
+static char* __PYX_DEFAULT_STRING_ENCODING;
+static int __Pyx_init_sys_getdefaultencoding_params() {
+    PyObject* sys = NULL;
+    PyObject* default_encoding = NULL;
+    char* default_encoding_c;
+    sys = PyImport_ImportModule("sys");
+    if (sys == NULL) goto bad;
+    default_encoding = PyObject_CallMethod(sys, (char*) (const char*) "getdefaultencoding", NULL);
+    if (default_encoding == NULL) goto bad;
+    default_encoding_c = PyBytes_AS_STRING(default_encoding);
+    __PYX_DEFAULT_STRING_ENCODING = (char*) malloc(strlen(default_encoding_c));
+    strcpy(__PYX_DEFAULT_STRING_ENCODING, default_encoding_c);
+    Py_DECREF(sys);
+    Py_DECREF(default_encoding);
+    return 0;
+bad:
+    Py_XDECREF(sys);
+    Py_XDECREF(default_encoding);
+    return -1;
+}
+#endif
+#endif
 
 
 #ifdef __GNUC__
@@ -354,8 +506,9 @@ static CYTHON_INLINE size_t __Pyx_PyInt_AsSize_t(PyObject*);
   #define likely(x)   (x)
   #define unlikely(x) (x)
 #endif /* __GNUC__ */
-    
+
 static PyObject *__pyx_m;
+static PyObject *__pyx_d;
 static PyObject *__pyx_b;
 static PyObject *__pyx_empty_tuple;
 static PyObject *__pyx_empty_bytes;
@@ -372,7 +525,6 @@ static const char *__pyx_f[] = {
   "hypergraph.pxi",
   "lattice.pxi",
   "mteval.pxi",
-  "stringsource",
   "cdec.sa._sa.pxd",
 };
 
@@ -441,7 +593,7 @@ struct __pyx_opt_args_5_cdec_as_str {
   char *error_msg;
 };
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":25
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":25
  *     cdef void read_handle(self, FILE* f)
  * 
  * cdef class FeatureVector:             # <<<<<<<<<<<<<<
@@ -468,7 +620,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":21
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":21
  *         return '[%s]' % self.cat
  * 
  * cdef class NTRef:             # <<<<<<<<<<<<<<
@@ -481,7 +633,7 @@ struct __pyx_obj_5_cdec_NTRef {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":121
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":121
  *         return CandidateSet(self)
  * 
  * cdef class Scorer:             # <<<<<<<<<<<<<<
@@ -495,7 +647,7 @@ struct __pyx_obj_5_cdec_Scorer {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":12
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":12
  *     cdef void read_handle(self, FILE* f)
  * 
  * cdef class IntList:             # <<<<<<<<<<<<<<
@@ -512,7 +664,7 @@ struct __pyx_obj_4cdec_2sa_3_sa_IntList {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":29
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":29
  *     cdef FloatList values
  * 
  * cdef class Phrase:             # <<<<<<<<<<<<<<
@@ -529,7 +681,7 @@ struct __pyx_obj_4cdec_2sa_3_sa_Phrase {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":90
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":90
  *         return candidate
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -545,7 +697,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":193
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":193
  *         super(MRule, self).__init__(lhs, rhs, e, scores, None)
  * 
  * cdef class Grammar:             # <<<<<<<<<<<<<<
@@ -558,7 +710,7 @@ struct __pyx_obj_5_cdec_Grammar {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":63
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":63
  *     def todot(self):
  *         """lattice.todot() -> Representation of the lattice in GraphViz dot format."""
  *         def lines():             # <<<<<<<<<<<<<<
@@ -581,7 +733,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":108
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":108
  *             del hypos
  * 
  *     def sample_trees(self, unsigned n):             # <<<<<<<<<<<<<<
@@ -599,7 +751,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":161
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":161
  * 
  *     property edges:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -615,7 +767,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":5
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":5
  * import cdec.sa._sa as _sa
  * 
  * def _phrase(phrase):             # <<<<<<<<<<<<<<
@@ -628,7 +780,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":65
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":65
  *         return result
  * 
  * cdef class CandidateSet:             # <<<<<<<<<<<<<<
@@ -643,7 +795,7 @@ struct __pyx_obj_5_cdec_CandidateSet {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":167
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":167
  * 
  *     property nodes:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -659,7 +811,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":49
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":49
  *     return TRule(lhs, f, e, scores, a)
  * 
  * cdef class TRule:             # <<<<<<<<<<<<<<
@@ -672,7 +824,7 @@ struct __pyx_obj_5_cdec_TRule {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":35
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":35
  *     cdef public int chunklen(self, int k)
  * 
  * cdef class Rule:             # <<<<<<<<<<<<<<
@@ -690,7 +842,7 @@ struct __pyx_obj_4cdec_2sa_3_sa_Rule {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":177
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":177
  *                 _phrase(self.f), _phrase(self.e), scores)
  * 
  * cdef class MRule(TRule):             # <<<<<<<<<<<<<<
@@ -702,7 +854,7 @@ struct __pyx_obj_5_cdec_MRule {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":100
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":100
  *         self.cs.AddKBestCandidates(hypergraph.hg[0], k, self.scorer.get())
  * 
  * cdef class SegmentEvaluator:             # <<<<<<<<<<<<<<
@@ -733,7 +885,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":61
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":61
  *             yield self[i]
  * 
  *     def todot(self):             # <<<<<<<<<<<<<<
@@ -746,7 +898,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":12
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":12
  *         return stats
  * 
  * cdef class Candidate:             # <<<<<<<<<<<<<<
@@ -760,7 +912,7 @@ struct __pyx_obj_5_cdec_Candidate {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":173
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":173
  * 
  *     def __str__(self):
  *         scores = ' '.join('%s=%s' % feat for feat in self.scores)             # <<<<<<<<<<<<<<
@@ -777,7 +929,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":8
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":8
  *     return ' '.join(w.encode('utf8') if isinstance(w, unicode) else str(w) for w in phrase)
  * 
  * cdef class NT:             # <<<<<<<<<<<<<<
@@ -791,7 +943,7 @@ struct __pyx_obj_5_cdec_NT {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":3
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":3
  * from libc.stdio cimport FILE
  * 
  * cdef class FloatList:             # <<<<<<<<<<<<<<
@@ -808,7 +960,7 @@ struct __pyx_obj_4cdec_2sa_3_sa_FloatList {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":196
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":196
  *         return vector
  * 
  * cdef class HypergraphEdge:             # <<<<<<<<<<<<<<
@@ -824,7 +976,7 @@ struct __pyx_obj_5_cdec_HypergraphEdge {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":72
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":72
  *         self.vector.set_value(fid, value)
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -841,7 +993,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":256
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":256
  * 
  *     property in_edges:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -857,7 +1009,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":131
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":131
  * 
  *     property a:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -874,7 +1026,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":56
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":56
  *         return unicode(str(self), 'utf8')
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -904,7 +1056,7 @@ struct __pyx_obj_5_cdec_Decoder {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":246
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":246
  *         raise NotImplemented('comparison not implemented for HypergraphEdge')
  * 
  * cdef class HypergraphNode:             # <<<<<<<<<<<<<<
@@ -919,7 +1071,7 @@ struct __pyx_obj_5_cdec_HypergraphNode {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":48
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":48
  *         return sparse
  * 
  * cdef class SparseVector:             # <<<<<<<<<<<<<<
@@ -932,7 +1084,7 @@ struct __pyx_obj_5_cdec_SparseVector {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":262
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":262
  * 
  *     property out_edges:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -948,7 +1100,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":32
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":32
  *         self.vector[0][fid] = value
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -964,7 +1116,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":44
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":44
  *         return self.stats.size()
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -981,7 +1133,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":3
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":3
  * from cython.operator cimport preincrement as pinc
  * 
  * cdef class DenseVector:             # <<<<<<<<<<<<<<
@@ -995,7 +1147,7 @@ struct __pyx_obj_5_cdec_DenseVector {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":199
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":199
  *         del self.grammar
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -1014,7 +1166,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":176
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":176
  *         out.fields[i] = ss[i]
  * 
  * cdef class Metric:             # <<<<<<<<<<<<<<
@@ -1027,7 +1179,7 @@ struct __pyx_obj_5_cdec_Metric {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":26
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":26
  *             return fmap
  * 
  * cdef class SufficientStats:             # <<<<<<<<<<<<<<
@@ -1041,7 +1193,7 @@ struct __pyx_obj_5_cdec_SufficientStats {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":49
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":49
  *         return unicode(hypergraph.JoshuaVisualizationString(self.hg[0]).c_str(), 'utf8')
  * 
  *     def kbest(self, size):             # <<<<<<<<<<<<<<
@@ -1060,7 +1212,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":81
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":81
  *             del e_derivations
  * 
  *     def kbest_features(self, size):             # <<<<<<<<<<<<<<
@@ -1080,7 +1232,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":216
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":216
  * 
  *     property tail_nodes:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -1096,7 +1248,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":172
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":172
  *             self.rule.get().lhs_ = -TDConvert((<NT> lhs).cat)
  * 
  *     def __str__(self):             # <<<<<<<<<<<<<<
@@ -1109,7 +1261,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":6
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":6
  * 
  * def _phrase(phrase):
  *     return ' '.join(w.encode('utf8') if isinstance(w, unicode) else str(w) for w in phrase)             # <<<<<<<<<<<<<<
@@ -1126,7 +1278,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":62
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":62
  *             del derivations
  * 
  *     def kbest_trees(self, size):             # <<<<<<<<<<<<<<
@@ -1149,7 +1301,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":4
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":4
  * cimport kbest
  * 
  * cdef class Hypergraph:             # <<<<<<<<<<<<<<
@@ -1164,7 +1316,7 @@ struct __pyx_obj_5_cdec_Hypergraph {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":3
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":3
  * cimport lattice
  * 
  * cdef class Lattice:             # <<<<<<<<<<<<<<
@@ -1177,7 +1329,7 @@ struct __pyx_obj_5_cdec_Lattice {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":97
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":97
  *             del derivations
  * 
  *     def sample(self, unsigned n):             # <<<<<<<<<<<<<<
@@ -1218,7 +1370,7 @@ struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config {
 };
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":217
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":217
  *             self.grammar.get().SetGrammarName(name)
  * 
  * cdef class TextGrammar(Grammar):             # <<<<<<<<<<<<<<
@@ -1231,7 +1383,7 @@ struct __pyx_obj_5_cdec_TextGrammar {
 
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":4
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":4
  * cimport kbest
  * 
  * cdef class Hypergraph:             # <<<<<<<<<<<<<<
@@ -1245,7 +1397,7 @@ struct __pyx_vtabstruct_5_cdec_Hypergraph {
 static struct __pyx_vtabstruct_5_cdec_Hypergraph *__pyx_vtabptr_5_cdec_Hypergraph;
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":196
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":196
  *         return vector
  * 
  * cdef class HypergraphEdge:             # <<<<<<<<<<<<<<
@@ -1259,7 +1411,7 @@ struct __pyx_vtabstruct_5_cdec_HypergraphEdge {
 static struct __pyx_vtabstruct_5_cdec_HypergraphEdge *__pyx_vtabptr_5_cdec_HypergraphEdge;
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":12
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":12
  *     cdef void read_handle(self, FILE* f)
  * 
  * cdef class IntList:             # <<<<<<<<<<<<<<
@@ -1279,7 +1431,7 @@ struct __pyx_vtabstruct_4cdec_2sa_3_sa_IntList {
 static struct __pyx_vtabstruct_4cdec_2sa_3_sa_IntList *__pyx_vtabptr_4cdec_2sa_3_sa_IntList;
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":3
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":3
  * from libc.stdio cimport FILE
  * 
  * cdef class FloatList:             # <<<<<<<<<<<<<<
@@ -1295,7 +1447,7 @@ struct __pyx_vtabstruct_4cdec_2sa_3_sa_FloatList {
 static struct __pyx_vtabstruct_4cdec_2sa_3_sa_FloatList *__pyx_vtabptr_4cdec_2sa_3_sa_FloatList;
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/cdec.sa._sa.pxd":29
+/* "/Users/vchahun/Sandbox/cdec/python/src/cdec.sa._sa.pxd":29
  *     cdef FloatList values
  * 
  * cdef class Phrase:             # <<<<<<<<<<<<<<
@@ -1310,7 +1462,7 @@ struct __pyx_vtabstruct_4cdec_2sa_3_sa_Phrase {
 static struct __pyx_vtabstruct_4cdec_2sa_3_sa_Phrase *__pyx_vtabptr_4cdec_2sa_3_sa_Phrase;
 
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":246
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":246
  *         raise NotImplemented('comparison not implemented for HypergraphEdge')
  * 
  * cdef class HypergraphNode:             # <<<<<<<<<<<<<<
@@ -1376,7 +1528,22 @@ static struct __pyx_vtabstruct_5_cdec_HypergraphNode *__pyx_vtabptr_5_cdec_Hyper
 #define __Pyx_CLEAR(r)    do { PyObject* tmp = ((PyObject*)(r)); r = NULL; __Pyx_DECREF(tmp);} while(0)
 #define __Pyx_XCLEAR(r)   do { if((r) != NULL) {PyObject* tmp = ((PyObject*)(r)); r = NULL; __Pyx_DECREF(tmp);}} while(0)
 
-static PyObject *__Pyx_GetName(PyObject *dict, PyObject *name); /*proto*/
+#if CYTHON_COMPILING_IN_CPYTHON
+static CYTHON_INLINE PyObject* __Pyx_PyObject_GetAttrStr(PyObject* obj, PyObject* attr_name) {
+    PyTypeObject* tp = Py_TYPE(obj);
+    if (likely(tp->tp_getattro))
+        return tp->tp_getattro(obj, attr_name);
+#if PY_MAJOR_VERSION < 3
+    if (likely(tp->tp_getattr))
+        return tp->tp_getattr(obj, PyString_AS_STRING(attr_name));
+#endif
+    return PyObject_GetAttr(obj, attr_name);
+}
+#else
+#define __Pyx_PyObject_GetAttrStr(o,n) PyObject_GetAttr(o,n)
+#endif
+
+static PyObject *__Pyx_GetBuiltinName(PyObject *name); /*proto*/
 
 static CYTHON_INLINE void __Pyx_ErrRestore(PyObject *type, PyObject *value, PyObject *tb); /*proto*/
 static CYTHON_INLINE void __Pyx_ErrFetch(PyObject **type, PyObject **value, PyObject **tb); /*proto*/
@@ -1391,11 +1558,6 @@ static CYTHON_INLINE int __Pyx_CheckKeywordStrings(PyObject *kwdict, const char*
 static int __Pyx_ArgTypeTest(PyObject *obj, PyTypeObject *type, int none_allowed,
     const char *name, int exact); /*proto*/
 
-static CYTHON_INLINE PyObject* __Pyx_tp_new(PyObject* type_obj) {
-    return (PyObject*) (((PyTypeObject*)(type_obj))->tp_new(
-        (PyTypeObject*)(type_obj), __pyx_empty_tuple, NULL));
-}
-
 static CYTHON_INLINE int __Pyx_TypeTest(PyObject *obj, PyTypeObject *type); /*proto*/
 
 static CYTHON_INLINE void __Pyx_RaiseClosureNameError(const char *varname);
@@ -1406,106 +1568,80 @@ static int __Pyx_ParseOptionalKeywords(PyObject *kwds, PyObject **argnames[], \
     PyObject *kwds2, PyObject *values[], Py_ssize_t num_pos_args, \
     const char* function_name); /*proto*/
 
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Append(PyObject* L, PyObject* x) {
-    if (likely(PyList_CheckExact(L))) {
-        if (unlikely(PyList_Append(L, x) < 0)) return NULL;
-        Py_INCREF(Py_None);
-        return Py_None; /* this is just to have an accurate signature */
-    } else {
-        PyObject *r, *m;
-        m = __Pyx_GetAttrString(L, "append");
-        if (!m) return NULL;
-        r = PyObject_CallFunctionObjArgs(m, x, NULL);
-        Py_DECREF(m);
-        return r;
-    }
-}
-
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Generic(PyObject *o, PyObject* j) {
-    PyObject *r;
-    if (!j) return NULL;
-    r = PyObject_GetItem(o, j);
-    Py_DECREF(j);
-    return r;
-}
-#define __Pyx_GetItemInt_List(o, i, size, to_py_func) (((size) <= sizeof(Py_ssize_t)) ? \
-                                                    __Pyx_GetItemInt_List_Fast(o, i) : \
-                                                    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_List_Fast(PyObject *o, Py_ssize_t i) {
 #if CYTHON_COMPILING_IN_CPYTHON
-    if (likely((0 <= i) & (i < PyList_GET_SIZE(o)))) {
-        PyObject *r = PyList_GET_ITEM(o, i);
-        Py_INCREF(r);
-        return r;
-    }
-    else if ((-PyList_GET_SIZE(o) <= i) & (i < 0)) {
-        PyObject *r = PyList_GET_ITEM(o, PyList_GET_SIZE(o) + i);
-        Py_INCREF(r);
-        return r;
+static CYTHON_INLINE int __Pyx_PyList_Append(PyObject* list, PyObject* x) {
+    PyListObject* L = (PyListObject*) list;
+    Py_ssize_t len = Py_SIZE(list);
+    if (likely(L->allocated > len) & likely(len > (L->allocated >> 1))) {
+        Py_INCREF(x);
+        PyList_SET_ITEM(list, len, x);
+        Py_SIZE(list) = len+1;
+        return 0;
     }
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
+    return PyList_Append(list, x);
+}
 #else
-    return PySequence_GetItem(o, i);
+#define __Pyx_PyList_Append(L,x) PyList_Append(L,x)
 #endif
-}
-#define __Pyx_GetItemInt_Tuple(o, i, size, to_py_func) (((size) <= sizeof(Py_ssize_t)) ? \
-                                                    __Pyx_GetItemInt_Tuple_Fast(o, i) : \
-                                                    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Tuple_Fast(PyObject *o, Py_ssize_t i) {
+
 #if CYTHON_COMPILING_IN_CPYTHON
-    if (likely((0 <= i) & (i < PyTuple_GET_SIZE(o)))) {
-        PyObject *r = PyTuple_GET_ITEM(o, i);
-        Py_INCREF(r);
-        return r;
-    }
-    else if ((-PyTuple_GET_SIZE(o) <= i) & (i < 0)) {
-        PyObject *r = PyTuple_GET_ITEM(o, PyTuple_GET_SIZE(o) + i);
-        Py_INCREF(r);
-        return r;
-    }
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
-#else
-    return PySequence_GetItem(o, i);
+#define __Pyx_PyObject_DelAttrStr(o,n) __Pyx_PyObject_SetAttrStr(o,n,NULL)
+static CYTHON_INLINE int __Pyx_PyObject_SetAttrStr(PyObject* obj, PyObject* attr_name, PyObject* value) {
+    PyTypeObject* tp = Py_TYPE(obj);
+    if (likely(tp->tp_setattro))
+        return tp->tp_setattro(obj, attr_name, value);
+#if PY_MAJOR_VERSION < 3
+    if (likely(tp->tp_setattr))
+        return tp->tp_setattr(obj, PyString_AS_STRING(attr_name), value);
 #endif
+    return PyObject_SetAttr(obj, attr_name, value);
 }
-#define __Pyx_GetItemInt(o, i, size, to_py_func) (((size) <= sizeof(Py_ssize_t)) ? \
-                                                    __Pyx_GetItemInt_Fast(o, i) : \
-                                                    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Fast(PyObject *o, Py_ssize_t i) {
-#if CYTHON_COMPILING_IN_CPYTHON
-    if (PyList_CheckExact(o)) {
-        Py_ssize_t n = (likely(i >= 0)) ? i : i + PyList_GET_SIZE(o);
-        if (likely((n >= 0) & (n < PyList_GET_SIZE(o)))) {
-            PyObject *r = PyList_GET_ITEM(o, n);
-            Py_INCREF(r);
-            return r;
-        }
-    }
-    else if (PyTuple_CheckExact(o)) {
-        Py_ssize_t n = (likely(i >= 0)) ? i : i + PyTuple_GET_SIZE(o);
-        if (likely((n >= 0) & (n < PyTuple_GET_SIZE(o)))) {
-            PyObject *r = PyTuple_GET_ITEM(o, n);
-            Py_INCREF(r);
-            return r;
-        }
-    } else {  /* inlined PySequence_GetItem() */
-        PySequenceMethods *m = Py_TYPE(o)->tp_as_sequence;
-        if (likely(m && m->sq_item)) {
-            if (unlikely(i < 0) && likely(m->sq_length)) {
-                Py_ssize_t l = m->sq_length(o);
-                if (unlikely(l < 0)) return NULL;
-                i += l;
-            }
-            return m->sq_item(o, i);
-        }
-    }
 #else
-    if (PySequence_Check(o)) {
-        return PySequence_GetItem(o, i);
-    }
+#define __Pyx_PyObject_DelAttrStr(o,n)   PyObject_DelAttr(o,n)
+#define __Pyx_PyObject_SetAttrStr(o,n,v) PyObject_SetAttr(o,n,v)
 #endif
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
+
+static PyObject* __Pyx_PyObject_CallMethodTuple(PyObject* obj, PyObject* method_name, PyObject* args) {
+    PyObject *method, *result = NULL;
+    if (unlikely(!args)) return NULL;
+    method = __Pyx_PyObject_GetAttrStr(obj, method_name);
+    if (unlikely(!method)) goto bad;
+    result = PyObject_Call(method, args, NULL);
+    Py_DECREF(method);
+bad:
+    Py_DECREF(args);
+    return result;
 }
+#define __Pyx_PyObject_CallMethod3(obj, name, arg1, arg2, arg3) \
+    __Pyx_PyObject_CallMethodTuple(obj, name, PyTuple_Pack(3, arg1, arg2, arg3))
+#define __Pyx_PyObject_CallMethod2(obj, name, arg1, arg2) \
+    __Pyx_PyObject_CallMethodTuple(obj, name, PyTuple_Pack(2, arg1, arg2))
+#define __Pyx_PyObject_CallMethod1(obj, name, arg1) \
+    __Pyx_PyObject_CallMethodTuple(obj, name, PyTuple_Pack(1, arg1))
+#define __Pyx_PyObject_CallMethod0(obj, name) \
+    __Pyx_PyObject_CallMethodTuple(obj, name, (Py_INCREF(__pyx_empty_tuple), __pyx_empty_tuple))
+
+static CYTHON_INLINE PyObject* __Pyx_PyObject_Append(PyObject* L, PyObject* x); /*proto*/
+
+#define __Pyx_GetItemInt(o, i, size, to_py_func, is_list, wraparound, boundscheck) \
+    (((size) <= sizeof(Py_ssize_t)) ? \
+    __Pyx_GetItemInt_Fast(o, i, is_list, wraparound, boundscheck) : \
+    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
+#define __Pyx_GetItemInt_List(o, i, size, to_py_func, is_list, wraparound, boundscheck) \
+    (((size) <= sizeof(Py_ssize_t)) ? \
+    __Pyx_GetItemInt_List_Fast(o, i, wraparound, boundscheck) : \
+    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_List_Fast(PyObject *o, Py_ssize_t i,
+                                                              int wraparound, int boundscheck);
+#define __Pyx_GetItemInt_Tuple(o, i, size, to_py_func, is_list, wraparound, boundscheck) \
+    (((size) <= sizeof(Py_ssize_t)) ? \
+    __Pyx_GetItemInt_Tuple_Fast(o, i, wraparound, boundscheck) : \
+    __Pyx_GetItemInt_Generic(o, to_py_func(i)))
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Tuple_Fast(PyObject *o, Py_ssize_t i,
+                                                              int wraparound, int boundscheck);
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Generic(PyObject *o, PyObject* j);
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Fast(PyObject *o, Py_ssize_t i,
+                                                     int is_list, int wraparound, int boundscheck);
 
 static CYTHON_INLINE void __Pyx_RaiseTooManyValuesError(Py_ssize_t expected);
 
@@ -1515,6 +1651,11 @@ static CYTHON_INLINE int __Pyx_IterFinish(void); /*proto*/
 
 static int __Pyx_IternextUnpackEndCheck(PyObject *retval, Py_ssize_t expected); /*proto*/
 
+static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name); /*proto*/
+
+static void __Pyx_WriteUnraisable(const char *name, int clineno,
+                                  int lineno, const char *filename); /*proto*/
+
 static CYTHON_INLINE int __Pyx_PyDict_Contains(PyObject* item, PyObject* dict, int eq) {
     int result = PyDict_Contains(dict, item);
     return unlikely(result < 0) ? result : (result == (eq == Py_EQ));
@@ -1523,34 +1664,56 @@ static CYTHON_INLINE int __Pyx_PyDict_Contains(PyObject* item, PyObject* dict, i
 #define __Pyx_PyIter_Next(obj) __Pyx_PyIter_Next2(obj, NULL)
 static CYTHON_INLINE PyObject *__Pyx_PyIter_Next2(PyObject *, PyObject *); /*proto*/
 
-static PyObject* __Pyx_PyDict_GetItemDefault(PyObject* d, PyObject* key, PyObject* default_value) {
-    PyObject* value;
-#if PY_MAJOR_VERSION >= 3
-    value = PyDict_GetItemWithError(d, key);
-    if (unlikely(!value)) {
-        if (unlikely(PyErr_Occurred()))
-            return NULL;
-        value = default_value;
-    }
-    Py_INCREF(value);
-#else
-    if (PyString_CheckExact(key) || PyUnicode_CheckExact(key) || PyInt_CheckExact(key)) {
-        value = PyDict_GetItem(d, key);
-        if (unlikely(!value)) {
-            value = default_value;
-        }
-        Py_INCREF(value);
-    } else {
-        PyObject *m;
-        m = __Pyx_GetAttrString(d, "get");
-        if (!m) return NULL;
-        value = PyObject_CallFunctionObjArgs(m, key,
-                                             (default_value == Py_None) ? NULL : default_value, NULL);
-        Py_DECREF(m);
-    }
-#endif
-    return value;
-}
+#define __Pyx_CyFunction_USED 1
+#include <structmember.h>
+#define __Pyx_CYFUNCTION_STATICMETHOD  0x01
+#define __Pyx_CYFUNCTION_CLASSMETHOD   0x02
+#define __Pyx_CYFUNCTION_CCLASS        0x04
+#define __Pyx_CyFunction_GetClosure(f) \
+    (((__pyx_CyFunctionObject *) (f))->func_closure)
+#define __Pyx_CyFunction_GetClassObj(f) \
+    (((__pyx_CyFunctionObject *) (f))->func_classobj)
+#define __Pyx_CyFunction_Defaults(type, f) \
+    ((type *)(((__pyx_CyFunctionObject *) (f))->defaults))
+#define __Pyx_CyFunction_SetDefaultsGetter(f, g) \
+    ((__pyx_CyFunctionObject *) (f))->defaults_getter = (g)
+typedef struct {
+    PyCFunctionObject func;
+    int flags;
+    PyObject *func_dict;
+    PyObject *func_weakreflist;
+    PyObject *func_name;
+    PyObject *func_qualname;
+    PyObject *func_doc;
+    PyObject *func_code;
+    PyObject *func_closure;
+    PyObject *func_classobj; /* No-args super() class cell */
+    void *defaults;
+    int defaults_pyobjects;
+    PyObject *defaults_tuple;   /* Const defaults tuple */
+    PyObject *defaults_kwdict;  /* Const kwonly defaults dict */
+    PyObject *(*defaults_getter)(PyObject *);
+    PyObject *func_annotations; /* function annotations dict */
+} __pyx_CyFunctionObject;
+static PyTypeObject *__pyx_CyFunctionType = 0;
+#define __Pyx_CyFunction_NewEx(ml, flags, qualname, self, module, code) \
+    __Pyx_CyFunction_New(__pyx_CyFunctionType, ml, flags, qualname, self, module, code)
+static PyObject *__Pyx_CyFunction_New(PyTypeObject *, PyMethodDef *ml,
+                                      int flags, PyObject* qualname,
+                                      PyObject *self, PyObject *module,
+                                      PyObject* code);
+static CYTHON_INLINE void *__Pyx_CyFunction_InitDefaults(PyObject *m,
+                                                         size_t size,
+                                                         int pyobjects);
+static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsTuple(PyObject *m,
+                                                            PyObject *tuple);
+static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsKwDict(PyObject *m,
+                                                             PyObject *dict);
+static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *m,
+                                                              PyObject *dict);
+static int __Pyx_CyFunction_init(void);
+
+static PyObject* __Pyx_PyDict_GetItemDefault(PyObject* d, PyObject* key, PyObject* default_value); /*proto*/
 
 static double __Pyx__PyObject_AsDouble(PyObject* obj); /* proto */
 #if CYTHON_COMPILING_IN_PYPY
@@ -1566,6 +1729,12 @@ static double __Pyx__PyObject_AsDouble(PyObject* obj); /* proto */
 
 static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb); /*proto*/
 
+#include <string.h>
+
+static int __Pyx_SetVtable(PyObject *dict, void *vtable); /*proto*/
+
+static void* __Pyx_GetVtable(PyObject *dict); /*proto*/
+
 static CYTHON_INLINE void __Pyx_ExceptionSave(PyObject **type, PyObject **value, PyObject **tb); /*proto*/
 static void __Pyx_ExceptionReset(PyObject *type, PyObject *value, PyObject *tb); /*proto*/
 
@@ -1619,49 +1788,6 @@ static CYTHON_INLINE WordID __Pyx_PyInt_from_py_WordID(PyObject *);
 
 static PyObject* __Pyx_Globals(void); /*proto*/
 
-#define __Pyx_CyFunction_USED 1
-#include <structmember.h>
-#define __Pyx_CYFUNCTION_STATICMETHOD  0x01
-#define __Pyx_CYFUNCTION_CLASSMETHOD   0x02
-#define __Pyx_CYFUNCTION_CCLASS        0x04
-#define __Pyx_CyFunction_GetClosure(f) \
-    (((__pyx_CyFunctionObject *) (f))->func_closure)
-#define __Pyx_CyFunction_GetClassObj(f) \
-    (((__pyx_CyFunctionObject *) (f))->func_classobj)
-#define __Pyx_CyFunction_Defaults(type, f) \
-    ((type *)(((__pyx_CyFunctionObject *) (f))->defaults))
-#define __Pyx_CyFunction_SetDefaultsGetter(f, g) \
-    ((__pyx_CyFunctionObject *) (f))->defaults_getter = (g)
-typedef struct {
-    PyCFunctionObject func;
-    int flags;
-    PyObject *func_dict;
-    PyObject *func_weakreflist;
-    PyObject *func_name;
-    PyObject *func_qualname;
-    PyObject *func_doc;
-    PyObject *func_code;
-    PyObject *func_closure;
-    PyObject *func_classobj; /* No-args super() class cell */
-    void *defaults;
-    int defaults_pyobjects;
-    PyObject *defaults_tuple; /* Const defaults tuple */
-    PyObject *(*defaults_getter)(PyObject *);
-} __pyx_CyFunctionObject;
-static PyTypeObject *__pyx_CyFunctionType = 0;
-#define __Pyx_CyFunction_NewEx(ml, flags, qualname, self, module, code) \
-    __Pyx_CyFunction_New(__pyx_CyFunctionType, ml, flags, qualname, self, module, code)
-static PyObject *__Pyx_CyFunction_New(PyTypeObject *, PyMethodDef *ml,
-                                      int flags, PyObject* qualname,
-                                      PyObject *self, PyObject *module,
-                                      PyObject* code);
-static CYTHON_INLINE void *__Pyx_CyFunction_InitDefaults(PyObject *m,
-                                                         size_t size,
-                                                         int pyobjects);
-static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsTuple(PyObject *m,
-                                                            PyObject *tuple);
-static int __Pyx_CyFunction_init(void);
-
 static CYTHON_INLINE unsigned char __Pyx_PyInt_AsUnsignedChar(PyObject *);
 
 static CYTHON_INLINE unsigned short __Pyx_PyInt_AsUnsignedShort(PyObject *);
@@ -1723,13 +1849,8 @@ static int __Pyx_PyGen_FetchStopIterationValue(PyObject **pvalue);
 #define __Pyx_PyGen_FetchStopIterationValue(pvalue) PyGen_FetchStopIterationValue(pvalue)
 #endif
 
-static void __Pyx_WriteUnraisable(const char *name, int clineno,
-                                  int lineno, const char *filename); /*proto*/
-
 static int __Pyx_check_binary_version(void);
 
-static int __Pyx_SetVtable(PyObject *dict, void *vtable); /*proto*/
-
 #if !defined(__Pyx_PyIdentifier_FromString)
 #if PY_MAJOR_VERSION < 3
   #define __Pyx_PyIdentifier_FromString(s) PyString_FromString(s)
@@ -1742,8 +1863,6 @@ static PyObject *__Pyx_ImportModule(const char *name); /*proto*/
 
 static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name, size_t size, int strict);  /*proto*/
 
-static void* __Pyx_GetVtable(PyObject *dict); /*proto*/
-
 static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**f)(void), const char *sig); /*proto*/
 
 typedef struct {
@@ -1804,51 +1923,51 @@ static int (*__pyx_f_4cdec_2sa_3_sa_sym_getindex)(int); /*proto*/
 /* Module declarations from 'mteval' */
 
 /* Module declarations from '_cdec' */
-static PyTypeObject *__pyx_ptype_5_cdec_DenseVector = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_SparseVector = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_NT = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Scorer = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_24___init__ = 0;
 static PyTypeObject *__pyx_ptype_5_cdec_NTRef = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_TRule = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_MRule = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_22___iter__ = 0;
 static PyTypeObject *__pyx_ptype_5_cdec_Grammar = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_TextGrammar = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Hypergraph = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_HypergraphEdge = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_HypergraphNode = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Lattice = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Candidate = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_SufficientStats = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_20_lines = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_12_sample_trees = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_13___get__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_2__phrase = 0;
 static PyTypeObject *__pyx_ptype_5_cdec_CandidateSet = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_14___get__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_TRule = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_3_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_MRule = 0;
 static PyTypeObject *__pyx_ptype_5_cdec_SegmentEvaluator = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Scorer = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Metric = 0;
-static PyTypeObject *__pyx_ptype_5_cdec_Decoder = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct____iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_25_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_19_todot = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Candidate = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_6_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_NT = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_HypergraphEdge = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_1___iter__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_2__phrase = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_3_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_16___get__ = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_4___get__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_5___str__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_6_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_18___iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Decoder = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_HypergraphNode = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_SparseVector = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_17___get__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct____iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_21___iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_DenseVector = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_7___iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Metric = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_SufficientStats = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_8_kbest = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_10_kbest_features = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_11_sample = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_12_sample_trees = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_13___get__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_14___get__ = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_15___get__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_16___get__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_17___get__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_18___iter__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_19_todot = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_20_lines = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_21___iter__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_22___iter__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_5___str__ = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Hypergraph = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_Lattice = 0;
+static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_11_sample = 0;
 static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_23__make_config = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_24___init__ = 0;
-static PyTypeObject *__pyx_ptype_5_cdec___pyx_scope_struct_25_genexpr = 0;
+static PyTypeObject *__pyx_ptype_5_cdec_TextGrammar = 0;
 static PyObject *__pyx_f_5_cdec_as_str(PyObject *, struct __pyx_opt_args_5_cdec_as_str *__pyx_optional_args); /*proto*/
 static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_obj_4cdec_2sa_3_sa_Rule *); /*proto*/
 static struct __pyx_obj_5_cdec_SufficientStats *__pyx_f_5_cdec_as_stats(PyObject *, PyObject *); /*proto*/
@@ -1866,7 +1985,6 @@ static PyObject *__pyx_builtin_range;
 static PyObject *__pyx_builtin_NotImplemented;
 static PyObject *__pyx_builtin_super;
 static PyObject *__pyx_builtin_ValueError;
-static PyObject *__pyx_builtin_basestring;
 static PyObject *__pyx_builtin_eval;
 static PyObject *__pyx_builtin_enumerate;
 static PyObject *__pyx_builtin_IndexError;
@@ -2024,6 +2142,51 @@ static int __pyx_pf_5_cdec_7Decoder_7weights_2__set__(struct __pyx_obj_5_cdec_De
 static PyObject *__pyx_pf_5_cdec_7Decoder_9formalism___get__(struct __pyx_obj_5_cdec_Decoder *__pyx_v_self); /* proto */
 static PyObject *__pyx_pf_5_cdec_7Decoder_4read_weights(struct __pyx_obj_5_cdec_Decoder *__pyx_v_self, PyObject *__pyx_v_weights); /* proto */
 static PyObject *__pyx_pf_5_cdec_7Decoder_6translate(struct __pyx_obj_5_cdec_Decoder *__pyx_v_self, PyObject *__pyx_v_sentence, PyObject *__pyx_v_grammar); /* proto */
+static PyObject *__pyx_tp_new_5_cdec_Scorer(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_24___init__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_NTRef(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Grammar(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_20_lines(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_13___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_2__phrase(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_CandidateSet(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_14___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_TRule(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_3_genexpr(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_MRule(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_SegmentEvaluator(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_25_genexpr(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_19_todot(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Candidate(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_NT(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_HypergraphEdge(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_1___iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_16___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_4___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Decoder(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_HypergraphNode(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_SparseVector(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_17___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct____iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_21___iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_DenseVector(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_7___iter__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Metric(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_SufficientStats(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_15___get__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_5___str__(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Hypergraph(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_Lattice(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_11_sample(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_23__make_config(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_5_cdec_TextGrammar(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static char __pyx_k_1[] = "Cannot convert type %s to str";
 static char __pyx_k_3[] = "cannot take the dot product of %s and SparseVector";
 static char __pyx_k_4[] = "comparison not implemented for SparseVector";
@@ -2049,7 +2212,7 @@ static char __pyx_k_26[] = "digraph lattice {";
   static char __pyx_k_31[] = "\\\"";
   static char __pyx_k_33[] = "%d [shape=doublecircle]";
 static char __pyx_k_34[] = "}";
-static char __pyx_k_37[] = "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi";
+static char __pyx_k_37[] = "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi";
 static char __pyx_k_38[] = "Lattice.todot.<locals>.lines";
 static char __pyx_k_39[] = "\n";
 static char __pyx_k_41[] = "sufficient stats vector index out of range";
@@ -2062,8 +2225,8 @@ static char __pyx_k_49[] = "#";
 static char __pyx_k_52[] = "Cannot translate input type %s";
 static char __pyx_k_53[] = "cdec.sa._sa";
 static char __pyx_k_54[] = "*";
-static char __pyx_k_57[] = "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi";
-static char __pyx_k_65[] = "/usr0/home/cdyer/cdec-merge/python/src/_cdec.pyx";
+static char __pyx_k_57[] = "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi";
+static char __pyx_k_65[] = "/Users/vchahun/Sandbox/cdec/python/src/_cdec.pyx";
 static char __pyx_k__a[] = "a";
 static char __pyx_k__e[] = "e";
 static char __pyx_k__f[] = "f";
@@ -2078,6 +2241,7 @@ static char __pyx_k___sa[] = "_sa";
 static char __pyx_k__cat[] = "cat";
 static char __pyx_k__dot[] = "dot";
 static char __pyx_k__fst[] = "fst";
+static char __pyx_k__get[] = "get";
 static char __pyx_k__hyp[] = "hyp";
 static char __pyx_k__inp[] = "inp";
 static char __pyx_k__key[] = "key";
@@ -2087,6 +2251,7 @@ static char __pyx_k__ref[] = "ref";
 static char __pyx_k__rhs[] = "rhs";
 static char __pyx_k__BLEU[] = "BLEU";
 static char __pyx_k__QCRI[] = "QCRI";
+static char __pyx_k__args[] = "args";
 static char __pyx_k__eval[] = "eval";
 static char __pyx_k__info[] = "info";
 static char __pyx_k__join[] = "join";
@@ -2095,9 +2260,11 @@ static char __pyx_k__open[] = "open";
 static char __pyx_k__refs[] = "refs";
 static char __pyx_k__scfg[] = "scfg";
 static char __pyx_k__self[] = "self";
+static char __pyx_k__send[] = "send";
 static char __pyx_k__span[] = "span";
 static char __pyx_k__utf8[] = "utf8";
 static char __pyx_k___cdec[] = "_cdec";
+static char __pyx_k__close[] = "close";
 static char __pyx_k__delta[] = "delta";
 static char __pyx_k__items[] = "items";
 static char __pyx_k__label[] = "label";
@@ -2108,7 +2275,9 @@ static char __pyx_k__score[] = "score";
 static char __pyx_k__split[] = "split";
 static char __pyx_k__strip[] = "strip";
 static char __pyx_k__super[] = "super";
+static char __pyx_k__throw[] = "throw";
 static char __pyx_k__value[] = "value";
+static char __pyx_k__append[] = "append";
 static char __pyx_k__config[] = "config";
 static char __pyx_k__csplit[] = "csplit";
 static char __pyx_k__encode[] = "encode";
@@ -2124,6 +2293,7 @@ static char __pyx_k__grammar[] = "grammar";
 static char __pyx_k__replace[] = "replace";
 static char __pyx_k__IBM_BLEU[] = "IBM_BLEU";
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 static char __pyx_k____exit__[] = "__exit__";
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 static PyObject *__pyx_n_s__beam_alpha;
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 static PyObject *__pyx_n_s__value;
 static PyObject *__pyx_n_s__weight;
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@@ -3220,7 +3422,7 @@ static void __pyx_pf_5_cdec_12SparseVector_2__dealloc__(CYTHON_UNUSED struct __p
   __Pyx_RefNannyDeclarations
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":56
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":56
  * 
  *     def __dealloc__(self):
  *         del self.vector             # <<<<<<<<<<<<<<
@@ -3244,7 +3446,7 @@ static PyObject *__pyx_pw_5_cdec_12SparseVector_5copy(PyObject *__pyx_v_self, CY
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":58
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":58
  *         del self.vector
  * 
  *     def copy(self):             # <<<<<<<<<<<<<<
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   __Pyx_RefNannySetupContext("copy", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":60
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":60
  *     def copy(self):
  *         """vector.copy() -> SparseVector copy."""
  *         return self * 1             # <<<<<<<<<<<<<<
@@ -3291,11 +3493,14 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_4copy(struct __pyx_obj_5_cdec_Sp
 static PyObject *__pyx_pw_5_cdec_12SparseVector_7__getitem__(PyObject *__pyx_v_self, PyObject *__pyx_arg_fname); /*proto*/
 static PyObject *__pyx_pw_5_cdec_12SparseVector_7__getitem__(PyObject *__pyx_v_self, PyObject *__pyx_arg_fname) {
   char *__pyx_v_fname;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
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   __Pyx_RefNannySetupContext("__getitem__ (wrapper)", 0);
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+    __pyx_v_fname = __Pyx_PyObject_AsString(__pyx_arg_fname); if (unlikely((!__pyx_v_fname) && PyErr_Occurred())) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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   goto __pyx_L4_argument_unpacking_done;
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@@ -3308,7 +3513,7 @@ static PyObject *__pyx_pw_5_cdec_12SparseVector_7__getitem__(PyObject *__pyx_v_s
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":62
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":62
  *         return self * 1
  * 
  *     def __getitem__(self, char* fname):             # <<<<<<<<<<<<<<
@@ -3328,7 +3533,7 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_6__getitem__(struct __pyx_obj_5_
   int __pyx_clineno = 0;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":63
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":63
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  *     def __getitem__(self, char* fname):
  *         cdef int fid = FDConvert(fname)             # <<<<<<<<<<<<<<
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   __pyx_v_fid = FD::Convert(__pyx_v_fname);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":64
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":64
  *     def __getitem__(self, char* fname):
  *         cdef int fid = FDConvert(fname)
  *         if fid < 0: raise KeyError(fname)             # <<<<<<<<<<<<<<
  *         return self.vector.value(fid)
  * 
  */
-  __pyx_t_1 = (__pyx_v_fid < 0);
+  __pyx_t_1 = ((__pyx_v_fid < 0) != 0);
   if (__pyx_t_1) {
-    __pyx_t_2 = PyBytes_FromString(__pyx_v_fname); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 64; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_2 = __Pyx_PyBytes_FromString(__pyx_v_fname); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 64; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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@@ -3363,7 +3568,7 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_6__getitem__(struct __pyx_obj_5_
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":65
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":65
  *         cdef int fid = FDConvert(fname)
  *         if fid < 0: raise KeyError(fname)
  *         return self.vector.value(fid)             # <<<<<<<<<<<<<<
@@ -3395,11 +3600,14 @@ static int __pyx_pw_5_cdec_12SparseVector_9__setitem__(PyObject *__pyx_v_self, P
 static int __pyx_pw_5_cdec_12SparseVector_9__setitem__(PyObject *__pyx_v_self, PyObject *__pyx_arg_fname, PyObject *__pyx_arg_value) {
   char *__pyx_v_fname;
   float __pyx_v_value;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
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+    __pyx_v_fname = __Pyx_PyObject_AsString(__pyx_arg_fname); if (unlikely((!__pyx_v_fname) && PyErr_Occurred())) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 67; __pyx_clineno = __LINE__; goto __pyx_L3_error;}
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@@ -3415,7 +3623,7 @@ static int __pyx_pw_5_cdec_12SparseVector_9__setitem__(PyObject *__pyx_v_self, P
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":67
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":67
  *         return self.vector.value(fid)
  * 
  *     def __setitem__(self, char* fname, float value):             # <<<<<<<<<<<<<<
@@ -3435,7 +3643,7 @@ static int __pyx_pf_5_cdec_12SparseVector_8__setitem__(struct __pyx_obj_5_cdec_S
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__setitem__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":68
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":68
  * 
  *     def __setitem__(self, char* fname, float value):
  *         cdef int fid = FDConvert(fname)             # <<<<<<<<<<<<<<
@@ -3444,16 +3652,16 @@ static int __pyx_pf_5_cdec_12SparseVector_8__setitem__(struct __pyx_obj_5_cdec_S
  */
   __pyx_v_fid = FD::Convert(__pyx_v_fname);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":69
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":69
  *     def __setitem__(self, char* fname, float value):
  *         cdef int fid = FDConvert(fname)
  *         if fid < 0: raise KeyError(fname)             # <<<<<<<<<<<<<<
  *         self.vector.set_value(fid, value)
  * 
  */
-  __pyx_t_1 = (__pyx_v_fid < 0);
+  __pyx_t_1 = ((__pyx_v_fid < 0) != 0);
   if (__pyx_t_1) {
-    __pyx_t_2 = PyBytes_FromString(__pyx_v_fname); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 69; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_2 = __Pyx_PyBytes_FromString(__pyx_v_fname); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 69; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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     __pyx_t_3 = PyTuple_New(1); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 69; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_GOTREF(__pyx_t_3);
@@ -3470,7 +3678,7 @@ static int __pyx_pf_5_cdec_12SparseVector_8__setitem__(struct __pyx_obj_5_cdec_S
   }
   __pyx_L3:;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":70
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":70
  *         cdef int fid = FDConvert(fname)
  *         if fid < 0: raise KeyError(fname)
  *         self.vector.set_value(fid, value)             # <<<<<<<<<<<<<<
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":72
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":72
  *         self.vector.set_value(fid, value)
  * 
  *     def __iter__(self):             # <<<<<<<<<<<<<<
@@ -3519,7 +3727,7 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_10__iter__(struct __pyx_obj_5_cd
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
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-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *)__pyx_ptype_5_cdec___pyx_scope_struct_1___iter__->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_1___iter__, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_1___iter__(__pyx_ptype_5_cdec___pyx_scope_struct_1___iter__, __pyx_empty_tuple, NULL);
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     return NULL;
@@ -3556,6 +3764,9 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
   PyObject *__pyx_t_5 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
   switch (__pyx_generator->resume_label) {
@@ -3568,7 +3779,7 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
   __pyx_L3_first_run:;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":73
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":73
  * 
  *     def __iter__(self):
  *         cdef FastSparseVector[weight_t].const_iterator* it = new FastSparseVector[weight_t].const_iterator(self.vector[0], False)             # <<<<<<<<<<<<<<
@@ -3577,7 +3788,7 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
  */
   __pyx_cur_scope->__pyx_v_it = new FastSparseVector<weight_t>::const_iterator((__pyx_cur_scope->__pyx_v_self->vector[0]), 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":75
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":75
  *         cdef FastSparseVector[weight_t].const_iterator* it = new FastSparseVector[weight_t].const_iterator(self.vector[0], False)
  *         cdef unsigned i
  *         try:             # <<<<<<<<<<<<<<
@@ -3586,7 +3797,7 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":76
+    /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":76
  *         cdef unsigned i
  *         try:
  *             for i in range(self.vector.size()):             # <<<<<<<<<<<<<<
@@ -3597,14 +3808,14 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
     for (__pyx_t_2 = 0; __pyx_t_2 < __pyx_t_1; __pyx_t_2+=1) {
       __pyx_cur_scope->__pyx_v_i = __pyx_t_2;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":77
+      /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":77
  *         try:
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  *                 yield (str(FDConvert(it[0].ptr().first).c_str()), it[0].ptr().second)             # <<<<<<<<<<<<<<
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-      __pyx_t_3 = PyBytes_FromString(FD::Convert((__pyx_cur_scope->__pyx_v_it[0]).operator->()->first).c_str()); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 77; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_3 = __Pyx_PyBytes_FromString(FD::Convert((__pyx_cur_scope->__pyx_v_it[0]).operator->()->first).c_str()); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 77; __pyx_clineno = __LINE__; goto __pyx_L5;}
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       __pyx_t_4 = PyTuple_New(1); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 77; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(__pyx_t_4);
@@ -3638,7 +3849,7 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
       __pyx_t_2 = __pyx_cur_scope->__pyx_t_1;
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":78
+      /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":78
  *             for i in range(self.vector.size()):
  *                 yield (str(FDConvert(it[0].ptr().first).c_str()), it[0].ptr().second)
  *                 pinc(it[0]) # ++it             # <<<<<<<<<<<<<<
@@ -3649,7 +3860,7 @@ static PyObject *__pyx_gb_5_cdec_12SparseVector_12generator1(__pyx_GeneratorObje
     }
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":80
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":80
  *                 pinc(it[0]) # ++it
  *         finally:
  *             del it             # <<<<<<<<<<<<<<
@@ -3711,7 +3922,7 @@ static PyObject *__pyx_pw_5_cdec_12SparseVector_14dot(PyObject *__pyx_v_self, Py
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":82
+/* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":82
  *             del it
  * 
  *     def dot(self, other):             # <<<<<<<<<<<<<<
@@ -3723,14 +3934,15 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_13dot(struct __pyx_obj_5_cdec_Sp
   PyObject *__pyx_r = NULL;
   __Pyx_RefNannyDeclarations
   int __pyx_t_1;
-  PyObject *__pyx_t_2 = NULL;
+  int __pyx_t_2;
   PyObject *__pyx_t_3 = NULL;
+  PyObject *__pyx_t_4 = NULL;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("dot", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":84
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":84
  *     def dot(self, other):
  *         """vector.dot(SparseVector/DenseVector other) -> Dot product of the two vectors."""
  *         if isinstance(other, DenseVector):             # <<<<<<<<<<<<<<
@@ -3738,9 +3950,10 @@ static PyObject *__pyx_pf_5_cdec_12SparseVector_13dot(struct __pyx_obj_5_cdec_Sp
  *         elif isinstance(other, SparseVector):
  */
   __pyx_t_1 = __Pyx_TypeCheck(__pyx_v_other, ((PyObject*)__pyx_ptype_5_cdec_DenseVector)); 
-  if (__pyx_t_1) {
+  __pyx_t_2 = (__pyx_t_1 != 0);
+  if (__pyx_t_2) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":85
+    /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":85
  *         """vector.dot(SparseVector/DenseVector other) -> Dot product of the two vectors."""
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     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_2 = PyFloat_FromDouble(__pyx_v_self->vector->dot((((struct __pyx_obj_5_cdec_DenseVector *)__pyx_v_other)->vector[0]))); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 85; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-    __Pyx_GOTREF(__pyx_t_2);
-    __pyx_r = __pyx_t_2;
-    __pyx_t_2 = 0;
+    __pyx_t_3 = PyFloat_FromDouble(__pyx_v_self->vector->dot((((struct __pyx_obj_5_cdec_DenseVector *)__pyx_v_other)->vector[0]))); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 85; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __Pyx_GOTREF(__pyx_t_3);
+    __pyx_r = __pyx_t_3;
+    __pyx_t_3 = 0;
     goto __pyx_L0;
     goto __pyx_L3;
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":86
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":86
  *         if isinstance(other, DenseVector):
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-  __pyx_t_1 = __Pyx_TypeCheck(__pyx_v_other, ((PyObject*)__pyx_ptype_5_cdec_SparseVector)); 
+  __pyx_t_2 = __Pyx_TypeCheck(__pyx_v_other, ((PyObject*)__pyx_ptype_5_cdec_SparseVector)); 
+  __pyx_t_1 = (__pyx_t_2 != 0);
   if (__pyx_t_1) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":87
+    /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":87
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  *             return self.vector.dot((<SparseVector> other).vector[0])             # <<<<<<<<<<<<<<
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     __Pyx_XDECREF(__pyx_r);
-    __pyx_t_2 = PyFloat_FromDouble(__pyx_v_self->vector->dot((((struct __pyx_obj_5_cdec_SparseVector *)__pyx_v_other)->vector[0]))); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 87; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-    __Pyx_GOTREF(__pyx_t_2);
-    __pyx_r = __pyx_t_2;
-    __pyx_t_2 = 0;
+    __pyx_t_3 = PyFloat_FromDouble(__pyx_v_self->vector->dot((((struct __pyx_obj_5_cdec_SparseVector *)__pyx_v_other)->vector[0]))); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 87; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __Pyx_GOTREF(__pyx_t_3);
+    __pyx_r = __pyx_t_3;
+    __pyx_t_3 = 0;
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     goto __pyx_L3;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":88
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_16__richcmp__(PyObject *__pyx_v_x, PyObject *__pyx_v_y, int __pyx_v_op) {
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":93
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":91
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":92
+    /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":92
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":93
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":94
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":95
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":97
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 static int __pyx_pw_5_cdec_12SparseVector_20__contains__(PyObject *__pyx_v_self, PyObject *__pyx_arg_fname) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":100
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":101
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":103
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":104
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":105
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":106
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":107
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_24__iadd__(PyObject *__pyx_v_self, PyObject *__pyx_v_other) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":109
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":110
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":111
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_26__isub__(PyObject *__pyx_v_self, PyObject *__pyx_v_other) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":113
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":114
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":115
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_28__imul__(PyObject *__pyx_v_self, PyObject *__pyx_arg_scalar) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":117
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":118
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":119
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_30__idiv__(PyObject *__pyx_v_self, PyObject *__pyx_arg_scalar) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":121
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":123
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_32__add__(PyObject *__pyx_v_x, PyObject *__pyx_v_y) {
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":128
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 static PyObject *__pyx_pw_5_cdec_12SparseVector_34__sub__(PyObject *__pyx_v_x, PyObject *__pyx_v_y) {
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":149
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":149
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-  __pyx_v_result = ((struct __pyx_obj_5_cdec_SparseVector *)__pyx_t_2);
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":150
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":150
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":151
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":151
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":6
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":5
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":5
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":6
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":6
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   PyObject *__pyx_v_cat = 0;
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":11
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":13
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   __pyx_v_self->cat = __pyx_v_cat;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":14
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":14
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":16
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":17
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  *         return '[%s]' % self.cat
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-  __pyx_t_1 = (__pyx_v_self->ref > 0);
+  __pyx_t_1 = ((__pyx_v_self->ref > 0) != 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":18
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":18
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":19
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":19
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  *         return '[%s]' % self.cat             # <<<<<<<<<<<<<<
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":9
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":10
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":10
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   unsigned int __pyx_v_ref;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":23
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":25
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":27
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":28
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":22
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":30
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":31
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":32
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":32
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":33
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":34
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":34
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":35
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":36
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-    __pyx_t_6 = __pyx_f_4cdec_2sa_3_sa_sym_isvar((__pyx_v_fsyms[__pyx_v_i]));
+    __pyx_t_6 = (__pyx_f_4cdec_2sa_3_sa_sym_isvar((__pyx_v_fsyms[__pyx_v_i])) != 0);
     if (__pyx_t_6) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":37
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":37
  *     for i in range(rule.f.n):
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  *             f.append(_sa.sym_tostring(fsyms[i]))
  */
-      __pyx_t_1 = PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tocat((__pyx_v_fsyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 37; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_1 = __Pyx_PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tocat((__pyx_v_fsyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 37; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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@@ -5718,28 +5969,28 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
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+      __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_f, __pyx_t_1); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 37; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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       goto __pyx_L5;
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":39
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":39
  *             f.append(NT(_sa.sym_tocat(fsyms[i])))
  *         else:
  *             f.append(_sa.sym_tostring(fsyms[i]))             # <<<<<<<<<<<<<<
  *     cdef int* esyms = rule.e.syms
  *     for i in range(rule.e.n):
  */
-      __pyx_t_1 = PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tostring((__pyx_v_fsyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 39; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_1 = __Pyx_PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tostring((__pyx_v_fsyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 39; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_1));
-      __pyx_t_7 = PyList_Append(__pyx_v_f, ((PyObject *)__pyx_t_1)); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 39; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_f, ((PyObject *)__pyx_t_1)); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 39; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":40
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":40
  *         else:
  *             f.append(_sa.sym_tostring(fsyms[i]))
  *     cdef int* esyms = rule.e.syms             # <<<<<<<<<<<<<<
@@ -5749,7 +6000,7 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
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   __pyx_v_esyms = __pyx_t_3;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":41
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":41
  *             f.append(_sa.sym_tostring(fsyms[i]))
  *     cdef int* esyms = rule.e.syms
  *     for i in range(rule.e.n):             # <<<<<<<<<<<<<<
@@ -5760,17 +6011,17 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
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     __pyx_v_i = __pyx_t_5;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":42
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":42
  *     cdef int* esyms = rule.e.syms
  *     for i in range(rule.e.n):
  *         if _sa.sym_isvar(esyms[i]):             # <<<<<<<<<<<<<<
  *             e.append(NTRef(_sa.sym_getindex(esyms[i])))
  *         else:
  */
-    __pyx_t_6 = __pyx_f_4cdec_2sa_3_sa_sym_isvar((__pyx_v_esyms[__pyx_v_i]));
+    __pyx_t_6 = (__pyx_f_4cdec_2sa_3_sa_sym_isvar((__pyx_v_esyms[__pyx_v_i])) != 0);
     if (__pyx_t_6) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":43
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":43
  *     for i in range(rule.e.n):
  *         if _sa.sym_isvar(esyms[i]):
  *             e.append(NTRef(_sa.sym_getindex(esyms[i])))             # <<<<<<<<<<<<<<
@@ -5787,35 +6038,35 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
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-      __pyx_t_7 = PyList_Append(__pyx_v_e, __pyx_t_1); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_e, __pyx_t_1); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":45
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":45
  *             e.append(NTRef(_sa.sym_getindex(esyms[i])))
  *         else:
  *             e.append(_sa.sym_tostring(esyms[i]))             # <<<<<<<<<<<<<<
  *     a = list(rule.alignments())
  *     return TRule(lhs, f, e, scores, a)
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-      __pyx_t_1 = PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tostring((__pyx_v_esyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 45; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_1 = __Pyx_PyBytes_FromString(__pyx_f_4cdec_2sa_3_sa_sym_tostring((__pyx_v_esyms[__pyx_v_i]))); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 45; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_1));
-      __pyx_t_7 = PyList_Append(__pyx_v_e, ((PyObject *)__pyx_t_1)); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 45; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_7 = __Pyx_PyList_Append(__pyx_v_e, ((PyObject *)__pyx_t_1)); if (unlikely(__pyx_t_7 == -1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 45; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":46
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":46
  *         else:
  *             e.append(_sa.sym_tostring(esyms[i]))
  *     a = list(rule.alignments())             # <<<<<<<<<<<<<<
  *     return TRule(lhs, f, e, scores, a)
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-  __pyx_t_1 = PyObject_GetAttr(((PyObject *)__pyx_v_rule), __pyx_n_s__alignments); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 46; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_rule), __pyx_n_s__alignments); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 46; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __Pyx_GOTREF(__pyx_t_2);
@@ -5831,7 +6082,7 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
   __pyx_v_a = ((PyObject*)__pyx_t_2);
   __pyx_t_2 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":47
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":47
  *             e.append(_sa.sym_tostring(esyms[i]))
  *     a = list(rule.alignments())
  *     return TRule(lhs, f, e, scores, a)             # <<<<<<<<<<<<<<
@@ -5839,7 +6090,7 @@ static struct __pyx_obj_5_cdec_TRule *__pyx_f_5_cdec_convert_rule(struct __pyx_o
  * cdef class TRule:
  */
   __Pyx_XDECREF(((PyObject *)__pyx_r));
-  __pyx_t_2 = PyBytes_FromString(__pyx_v_lhs); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_2 = __Pyx_PyBytes_FromString(__pyx_v_lhs); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_2));
   __pyx_t_1 = PyTuple_New(5); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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@@ -5894,6 +6145,9 @@ static int __pyx_pw_5_cdec_5TRule_1__init__(PyObject *__pyx_v_self, PyObject *__
   PyObject *__pyx_v_e = 0;
   PyObject *__pyx_v_scores = 0;
   PyObject *__pyx_v_a = 0;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   int __pyx_r;
   __Pyx_RefNannyDeclarations
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@@ -5901,7 +6155,7 @@ static int __pyx_pw_5_cdec_5TRule_1__init__(PyObject *__pyx_v_self, PyObject *__
     static PyObject **__pyx_pyargnames[] = {&__pyx_n_s__lhs,&__pyx_n_s__f,&__pyx_n_s__e,&__pyx_n_s__scores,&__pyx_n_s__a,0};
     PyObject* values[5] = {0,0,0,0,0};
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":52
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":52
  *     cdef shared_ptr[grammar.TRule]* rule
  * 
  *     def __init__(self, lhs, f, e, scores, a=None):             # <<<<<<<<<<<<<<
@@ -5990,7 +6244,7 @@ static int __pyx_pf_5_cdec_5TRule___init__(struct __pyx_obj_5_cdec_TRule *__pyx_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__init__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":59
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":59
  *         scores: dictionary of feature scores
  *         a: optional list of alignment points"""
  *         self.rule = new shared_ptr[grammar.TRule](new grammar.TRule())             # <<<<<<<<<<<<<<
@@ -6005,43 +6259,43 @@ static int __pyx_pf_5_cdec_5TRule___init__(struct __pyx_obj_5_cdec_TRule *__pyx_
   }
   __pyx_v_self->rule = new boost::shared_ptr<TRule>(__pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":60
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":60
  *         a: optional list of alignment points"""
  *         self.rule = new shared_ptr[grammar.TRule](new grammar.TRule())
  *         self.lhs = lhs             # <<<<<<<<<<<<<<
  *         self.e = e
  *         self.f = f
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-  if (PyObject_SetAttr(((PyObject *)__pyx_v_self), __pyx_n_s__lhs, __pyx_v_lhs) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 60; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_PyObject_SetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s__lhs, __pyx_v_lhs) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 60; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":61
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":61
  *         self.rule = new shared_ptr[grammar.TRule](new grammar.TRule())
  *         self.lhs = lhs
  *         self.e = e             # <<<<<<<<<<<<<<
  *         self.f = f
  *         self.scores = scores
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-  if (PyObject_SetAttr(((PyObject *)__pyx_v_self), __pyx_n_s__e, __pyx_v_e) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 61; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_PyObject_SetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s__e, __pyx_v_e) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 61; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":62
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":62
  *         self.lhs = lhs
  *         self.e = e
  *         self.f = f             # <<<<<<<<<<<<<<
  *         self.scores = scores
  *         if a:
  */
-  if (PyObject_SetAttr(((PyObject *)__pyx_v_self), __pyx_n_s__f, __pyx_v_f) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_PyObject_SetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s__f, __pyx_v_f) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":63
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":63
  *         self.e = e
  *         self.f = f
  *         self.scores = scores             # <<<<<<<<<<<<<<
  *         if a:
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-  if (PyObject_SetAttr(((PyObject *)__pyx_v_self), __pyx_n_s__scores, __pyx_v_scores) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 63; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_PyObject_SetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s__scores, __pyx_v_scores) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 63; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":64
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":64
  *         self.f = f
  *         self.scores = scores
  *         if a:             # <<<<<<<<<<<<<<
@@ -6051,19 +6305,19 @@ static int __pyx_pf_5_cdec_5TRule___init__(struct __pyx_obj_5_cdec_TRule *__pyx_
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   if (__pyx_t_2) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":65
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":65
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  *         if a:
  *             self.a = a             # <<<<<<<<<<<<<<
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-    if (PyObject_SetAttr(((PyObject *)__pyx_v_self), __pyx_n_s__a, __pyx_v_a) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    if (__Pyx_PyObject_SetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s__a, __pyx_v_a) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     goto __pyx_L3;
   }
   __pyx_L3:;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":66
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":66
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  *             self.a = a
  *         self.rule.get().ComputeArity()             # <<<<<<<<<<<<<<
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":68
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":68
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  * 
  *     def __dealloc__(self):             # <<<<<<<<<<<<<<
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   __Pyx_RefNannySetupContext("__dealloc__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":69
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":69
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  *     def __dealloc__(self):
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":72
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":72
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  *     property arity:
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":73
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":73
  *     property arity:
  *         def __get__(self):
  *             return self.rule.get().arity_             # <<<<<<<<<<<<<<
@@ -6180,7 +6434,7 @@ static PyObject *__pyx_pw_5_cdec_5TRule_1f_1__get__(PyObject *__pyx_v_self) {
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":76
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":76
  * 
  *     property f:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -6207,7 +6461,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":77
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":77
  *     property f:
  *         def __get__(self):
  *             cdef vector[WordID]* f_ = &self.rule.get().f_             # <<<<<<<<<<<<<<
@@ -6216,7 +6470,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
  */
   __pyx_v_f_ = (&__pyx_v_self->rule->get()->f_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":79
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":79
  *             cdef vector[WordID]* f_ = &self.rule.get().f_
  *             cdef WordID w
  *             cdef f = []             # <<<<<<<<<<<<<<
@@ -6228,7 +6482,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":81
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":81
  *             cdef f = []
  *             cdef unsigned i
  *             cdef int idx = 0             # <<<<<<<<<<<<<<
@@ -6237,7 +6491,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
  */
   __pyx_v_idx = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":82
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":82
  *             cdef unsigned i
  *             cdef int idx = 0
  *             for i in range(f_.size()):             # <<<<<<<<<<<<<<
@@ -6248,7 +6502,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
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     __pyx_v_i = __pyx_t_3;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":83
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":83
  *             cdef int idx = 0
  *             for i in range(f_.size()):
  *                 w = f_[0][i]             # <<<<<<<<<<<<<<
@@ -6257,17 +6511,17 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
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     __pyx_v_w = ((__pyx_v_f_[0])[__pyx_v_i]);
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":84
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":84
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  *                 w = f_[0][i]
  *                 if w < 0:             # <<<<<<<<<<<<<<
  *                     idx += 1
  *                     f.append(NT(TDConvert(-w).c_str(), idx))
  */
-    __pyx_t_4 = (__pyx_v_w < 0);
+    __pyx_t_4 = ((__pyx_v_w < 0) != 0);
     if (__pyx_t_4) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":85
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":85
  *                 w = f_[0][i]
  *                 if w < 0:
  *                     idx += 1             # <<<<<<<<<<<<<<
@@ -6276,14 +6530,14 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
  */
       __pyx_v_idx = (__pyx_v_idx + 1);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":86
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":86
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  *                     idx += 1
  *                     f.append(NT(TDConvert(-w).c_str(), idx))             # <<<<<<<<<<<<<<
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-      __pyx_t_1 = PyBytes_FromString(TD::Convert((-__pyx_v_w)).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 86; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_1 = __Pyx_PyBytes_FromString(TD::Convert((-__pyx_v_w)).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 86; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_1));
       __pyx_t_5 = PyInt_FromLong(__pyx_v_idx); if (unlikely(!__pyx_t_5)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 86; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_5);
@@ -6306,14 +6560,14 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
     }
     /*else*/ {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":88
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":88
  *                     f.append(NT(TDConvert(-w).c_str(), idx))
  *                 else:
  *                     f.append(unicode(TDConvert(w).c_str(), encoding='utf8'))             # <<<<<<<<<<<<<<
  *             return f
  * 
  */
-      __pyx_t_6 = PyBytes_FromString(TD::Convert(__pyx_v_w).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 88; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_6 = __Pyx_PyBytes_FromString(TD::Convert(__pyx_v_w).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 88; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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       __pyx_t_5 = PyTuple_New(1); if (unlikely(!__pyx_t_5)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 88; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_5);
@@ -6335,7 +6589,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1f___get__(struct __pyx_obj_5_cdec_TRule
     __pyx_L5:;
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":89
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":89
  *                 else:
  *                     f.append(unicode(TDConvert(w).c_str(), encoding='utf8'))
  *             return f             # <<<<<<<<<<<<<<
@@ -6373,7 +6627,7 @@ static int __pyx_pw_5_cdec_5TRule_1f_3__set__(PyObject *__pyx_v_self, PyObject *
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":91
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":91
  *             return f
  * 
  *         def __set__(self, f):             # <<<<<<<<<<<<<<
@@ -6392,14 +6646,15 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
   unsigned int __pyx_t_2;
   PyObject *__pyx_t_3 = NULL;
   int __pyx_t_4;
-  char *__pyx_t_5;
-  PyObject *__pyx_t_6 = NULL;
+  int __pyx_t_5;
+  char *__pyx_t_6;
+  PyObject *__pyx_t_7 = NULL;
   int __pyx_lineno = 0;
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__set__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":92
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":92
  * 
  *         def __set__(self, f):
  *             cdef vector[WordID]* f_ = &self.rule.get().f_             # <<<<<<<<<<<<<<
@@ -6408,7 +6663,7 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
  */
   __pyx_v_f_ = (&__pyx_v_self->rule->get()->f_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":93
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":93
  *         def __set__(self, f):
  *             cdef vector[WordID]* f_ = &self.rule.get().f_
  *             f_.resize(len(f))             # <<<<<<<<<<<<<<
@@ -6418,7 +6673,7 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
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   __pyx_v_f_->resize(__pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":95
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":95
  *             f_.resize(len(f))
  *             cdef unsigned i
  *             cdef int idx = 0             # <<<<<<<<<<<<<<
@@ -6427,7 +6682,7 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
  */
   __pyx_v_idx = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":96
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":96
  *             cdef unsigned i
  *             cdef int idx = 0
  *             for i in range(len(f)):             # <<<<<<<<<<<<<<
@@ -6438,60 +6693,61 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
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     __pyx_v_i = __pyx_t_2;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":97
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":97
  *             cdef int idx = 0
  *             for i in range(len(f)):
  *                 if isinstance(f[i], NT):             # <<<<<<<<<<<<<<
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  *                 else:
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-    __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 97; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong, 0, 0, 1); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 97; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_GOTREF(__pyx_t_3);
     __pyx_t_4 = __Pyx_TypeCheck(__pyx_t_3, ((PyObject*)__pyx_ptype_5_cdec_NT)); 
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-    if (__pyx_t_4) {
+    __pyx_t_5 = (__pyx_t_4 != 0);
+    if (__pyx_t_5) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":98
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":98
  *             for i in range(len(f)):
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-      __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 98; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong, 0, 0, 1); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 98; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      __pyx_t_5 = PyBytes_AsString(((PyObject *)((struct __pyx_obj_5_cdec_NT *)__pyx_t_3)->cat)); if (unlikely((!__pyx_t_5) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 98; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_6 = __Pyx_PyObject_AsString(((PyObject *)((struct __pyx_obj_5_cdec_NT *)__pyx_t_3)->cat)); if (unlikely((!__pyx_t_6) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 98; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-      ((__pyx_v_f_[0])[__pyx_v_i]) = (-TD::Convert(__pyx_t_5));
+      ((__pyx_v_f_[0])[__pyx_v_i]) = (-TD::Convert(__pyx_t_6));
       goto __pyx_L5;
     }
     /*else*/ {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":100
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":100
  *                     f_[0][i] = -TDConvert((<NT> f[i]).cat)
  *                 else:
  *                     fi = as_str(f[i])             # <<<<<<<<<<<<<<
  *                     f_[0][i] = TDConvert(fi)
  * 
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-      __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_f, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong, 0, 0, 1); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
       __Pyx_GOTREF(__pyx_t_3);
-      __pyx_t_6 = ((PyObject *)__pyx_f_5_cdec_as_str(__pyx_t_3, NULL)); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      __Pyx_GOTREF(__pyx_t_6);
+      __pyx_t_7 = ((PyObject *)__pyx_f_5_cdec_as_str(__pyx_t_3, NULL)); if (unlikely(!__pyx_t_7)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __Pyx_GOTREF(__pyx_t_7);
       __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
       __Pyx_XDECREF(((PyObject *)__pyx_v_fi));
-      __pyx_v_fi = ((PyObject*)__pyx_t_6);
-      __pyx_t_6 = 0;
+      __pyx_v_fi = ((PyObject*)__pyx_t_7);
+      __pyx_t_7 = 0;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":101
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":101
  *                 else:
  *                     fi = as_str(f[i])
  *                     f_[0][i] = TDConvert(fi)             # <<<<<<<<<<<<<<
  * 
  *     property e:
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-      __pyx_t_5 = PyBytes_AsString(((PyObject *)__pyx_v_fi)); if (unlikely((!__pyx_t_5) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 101; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      ((__pyx_v_f_[0])[__pyx_v_i]) = TD::Convert(__pyx_t_5);
+      __pyx_t_6 = __Pyx_PyObject_AsString(((PyObject *)__pyx_v_fi)); if (unlikely((!__pyx_t_6) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 101; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      ((__pyx_v_f_[0])[__pyx_v_i]) = TD::Convert(__pyx_t_6);
     }
     __pyx_L5:;
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@@ -6500,7 +6756,7 @@ static int __pyx_pf_5_cdec_5TRule_1f_2__set__(struct __pyx_obj_5_cdec_TRule *__p
   goto __pyx_L0;
   __pyx_L1_error:;
   __Pyx_XDECREF(__pyx_t_3);
-  __Pyx_XDECREF(__pyx_t_6);
+  __Pyx_XDECREF(__pyx_t_7);
   __Pyx_AddTraceback("_cdec.TRule.f.__set__", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __pyx_r = -1;
   __pyx_L0:;
@@ -6520,7 +6776,7 @@ static PyObject *__pyx_pw_5_cdec_5TRule_1e_1__get__(PyObject *__pyx_v_self) {
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":104
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":104
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  *     property e:
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   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":105
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":105
  *     property e:
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  *             cdef vector[WordID]* e_ = &self.rule.get().e_             # <<<<<<<<<<<<<<
@@ -6556,7 +6812,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
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   __pyx_v_e_ = (&__pyx_v_self->rule->get()->e_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":107
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":107
  *             cdef vector[WordID]* e_ = &self.rule.get().e_
  *             cdef WordID w
  *             cdef e = []             # <<<<<<<<<<<<<<
@@ -6568,7 +6824,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":109
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":109
  *             cdef e = []
  *             cdef unsigned i
  *             cdef int idx = 0             # <<<<<<<<<<<<<<
@@ -6577,7 +6833,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
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   __pyx_v_idx = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":110
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":110
  *             cdef unsigned i
  *             cdef int idx = 0
  *             for i in range(e_.size()):             # <<<<<<<<<<<<<<
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     __pyx_v_i = __pyx_t_3;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":111
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":111
  *             cdef int idx = 0
  *             for i in range(e_.size()):
  *                 w = e_[0][i]             # <<<<<<<<<<<<<<
@@ -6597,17 +6853,17 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
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     __pyx_v_w = ((__pyx_v_e_[0])[__pyx_v_i]);
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":112
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":112
  *             for i in range(e_.size()):
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  *                     idx += 1
  *                     e.append(NTRef(1-w))
  */
-    __pyx_t_4 = (__pyx_v_w < 1);
+    __pyx_t_4 = ((__pyx_v_w < 1) != 0);
     if (__pyx_t_4) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":113
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":113
  *                 w = e_[0][i]
  *                 if w < 1:
  *                     idx += 1             # <<<<<<<<<<<<<<
@@ -6616,7 +6872,7 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
  */
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":114
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":114
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@@ -6641,14 +6897,14 @@ static PyObject *__pyx_pf_5_cdec_5TRule_1e___get__(struct __pyx_obj_5_cdec_TRule
     }
     /*else*/ {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":116
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":116
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+      __pyx_t_5 = __Pyx_PyBytes_FromString(TD::Convert(__pyx_v_w).c_str()); if (unlikely(!__pyx_t_5)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 116; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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     __pyx_L5:;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":117
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":117
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":119
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":119
  *             return e
  * 
  *         def __set__(self, e):             # <<<<<<<<<<<<<<
@@ -6726,15 +6982,16 @@ static int __pyx_pf_5_cdec_5TRule_1e_2__set__(struct __pyx_obj_5_cdec_TRule *__p
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   int __pyx_t_4;
-  PyObject *__pyx_t_5 = NULL;
-  WordID __pyx_t_6;
-  char *__pyx_t_7;
+  int __pyx_t_5;
+  PyObject *__pyx_t_6 = NULL;
+  WordID __pyx_t_7;
+  char *__pyx_t_8;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":120
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":120
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  *         def __set__(self, e):
  *             cdef vector[WordID]* e_ = &self.rule.get().e_             # <<<<<<<<<<<<<<
@@ -6743,7 +7000,7 @@ static int __pyx_pf_5_cdec_5TRule_1e_2__set__(struct __pyx_obj_5_cdec_TRule *__p
  */
   __pyx_v_e_ = (&__pyx_v_self->rule->get()->e_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":121
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":121
  *         def __set__(self, e):
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  *             e_.resize(len(e))             # <<<<<<<<<<<<<<
@@ -6753,7 +7010,7 @@ static int __pyx_pf_5_cdec_5TRule_1e_2__set__(struct __pyx_obj_5_cdec_TRule *__p
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   __pyx_v_e_->resize(__pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":123
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":123
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  *             cdef unsigned i
  *             for i in range(len(e)):             # <<<<<<<<<<<<<<
@@ -6764,66 +7021,67 @@ static int __pyx_pf_5_cdec_5TRule_1e_2__set__(struct __pyx_obj_5_cdec_TRule *__p
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":124
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":124
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":125
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":125
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":127
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":127
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+      __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_e, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong, 0, 0, 1); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 127; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      __pyx_t_5 = ((PyObject *)__pyx_f_5_cdec_as_str(__pyx_t_3, NULL)); if (unlikely(!__pyx_t_5)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 127; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      __Pyx_GOTREF(__pyx_t_5);
+      __pyx_t_6 = ((PyObject *)__pyx_f_5_cdec_as_str(__pyx_t_3, NULL)); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 127; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __Pyx_GOTREF(__pyx_t_6);
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       __Pyx_XDECREF(((PyObject *)__pyx_v_ei));
-      __pyx_v_ei = ((PyObject*)__pyx_t_5);
-      __pyx_t_5 = 0;
+      __pyx_v_ei = ((PyObject*)__pyx_t_6);
+      __pyx_t_6 = 0;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":128
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":128
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  *     property a:
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-      __pyx_t_7 = PyBytes_AsString(((PyObject *)__pyx_v_ei)); if (unlikely((!__pyx_t_7) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 128; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      ((__pyx_v_e_[0])[__pyx_v_i]) = TD::Convert(__pyx_t_7);
+      __pyx_t_8 = __Pyx_PyObject_AsString(((PyObject *)__pyx_v_ei)); if (unlikely((!__pyx_t_8) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 128; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      ((__pyx_v_e_[0])[__pyx_v_i]) = TD::Convert(__pyx_t_8);
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@@ -6832,7 +7090,7 @@ static int __pyx_pf_5_cdec_5TRule_1e_2__set__(struct __pyx_obj_5_cdec_TRule *__p
   goto __pyx_L0;
   __pyx_L1_error:;
   __Pyx_XDECREF(__pyx_t_3);
-  __Pyx_XDECREF(__pyx_t_5);
+  __Pyx_XDECREF(__pyx_t_6);
   __Pyx_AddTraceback("_cdec.TRule.e.__set__", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __pyx_r = -1;
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@@ -6853,7 +7111,7 @@ static PyObject *__pyx_pw_5_cdec_5TRule_1a_1__get__(PyObject *__pyx_v_self) {
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":131
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":131
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  *     property a:
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-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)__pyx_ptype_5_cdec___pyx_scope_struct_4___get__->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_4___get__, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_4___get__(__pyx_ptype_5_cdec___pyx_scope_struct_4___get__, __pyx_empty_tuple, NULL);
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   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
   PyObject *__pyx_t_5 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":133
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":133
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":134
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":134
  *             cdef unsigned i
  *             cdef vector[grammar.AlignmentPoint]* a = &self.rule.get().a_
  *             for i in range(a.size()):             # <<<<<<<<<<<<<<
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":135
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":135
  *             cdef vector[grammar.AlignmentPoint]* a = &self.rule.get().a_
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":137
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":137
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":138
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":138
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  *         def __set__(self, a):
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   __pyx_v_a_ = (&__pyx_v_self->rule->get()->a_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":139
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":139
  *         def __set__(self, a):
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   __pyx_v_a_->resize(__pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":142
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":142
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  *             cdef int s, t
  *             for i in range(len(a)):             # <<<<<<<<<<<<<<
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":143
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":143
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+    __pyx_t_3 = __Pyx_GetItemInt(__pyx_v_a, __pyx_v_i, sizeof(unsigned int)+1, PyLong_FromUnsignedLong, 0, 0, 1); if (!__pyx_t_3) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 143; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":144
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":144
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  *                 a_[0][i] = grammar.AlignmentPoint(s, t)             # <<<<<<<<<<<<<<
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":147
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":147
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":148
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":148
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+  __pyx_t_1 = __pyx_tp_new_5_cdec_SparseVector(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_SparseVector)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 148; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":149
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":149
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  *             scores.vector = new FastSparseVector[double](self.rule.get().scores_)             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":150
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":150
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":152
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":152
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":153
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":153
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":154
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":154
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":157
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":158
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":159
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":159
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":160
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":160
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-    __pyx_t_11 = (__pyx_v_fid < 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":161
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":161
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":164
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":165
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":165
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+  __pyx_t_1 = __Pyx_PyBytes_FromString(TD::Convert((-__pyx_v_self->rule->get()->lhs_)).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 165; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":167
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":167
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":168
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":168
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-  __pyx_t_2 = (!__pyx_t_1);
+  __pyx_t_2 = ((!(__pyx_t_1 != 0)) != 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":169
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":169
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":170
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":170
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  *     def __str__(self):
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+  __pyx_t_5 = __Pyx_PyObject_AsString(((PyObject *)((struct __pyx_obj_5_cdec_NT *)__pyx_v_lhs)->cat)); if (unlikely((!__pyx_t_5) && PyErr_Occurred())) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 170; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   __pyx_r = 0;
@@ -7629,7 +7890,7 @@ static PyObject *__pyx_pw_5_cdec_5TRule_5__str__(PyObject *__pyx_v_self) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":173
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":173
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  *     def __str__(self):
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)__pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr(__pyx_ptype_5_cdec___pyx_scope_struct_6_genexpr, __pyx_empty_tuple, NULL);
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   PyObject *(*__pyx_t_4)(PyObject *);
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+  const char *__pyx_filename = NULL;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":172
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_5___str__(__pyx_ptype_5_cdec___pyx_scope_struct_5___str__, __pyx_empty_tuple, NULL);
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":173
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":173
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+  __pyx_t_1 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_kp_s_7), __pyx_n_s__join); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 173; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":174
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":174
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":175
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":175
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":183
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":184
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":184
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":185
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":186
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":190
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":196
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":197
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-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":199
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":200
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":201
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":204
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":206
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":207
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":207
  *             trule = TRule.__new__(TRule)
  *             trule.rule = new shared_ptr[grammar.TRule](rbin.GetIthRule(i))
  *             yield trule             # <<<<<<<<<<<<<<
@@ -8391,7 +8663,7 @@ static PyObject *__pyx_pw_5_cdec_7Grammar_4name_1__get__(PyObject *__pyx_v_self)
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":210
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":210
  * 
  *     property name:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -8409,14 +8681,14 @@ static PyObject *__pyx_pf_5_cdec_7Grammar_4name___get__(struct __pyx_obj_5_cdec_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":211
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":211
  *     property name:
  *         def __get__(self):
  *             str(self.grammar.get().GetGrammarName().c_str())             # <<<<<<<<<<<<<<
  * 
  *         def __set__(self, name):
  */
-  __pyx_t_1 = PyBytes_FromString(__pyx_v_self->grammar->get()->GetGrammarName().c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 211; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyBytes_FromString(__pyx_v_self->grammar->get()->GetGrammarName().c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 211; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_1));
   __pyx_t_2 = PyTuple_New(1); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 211; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
@@ -8452,7 +8724,7 @@ static int __pyx_pw_5_cdec_7Grammar_4name_3__set__(PyObject *__pyx_v_self, PyObj
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":213
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":213
  *             str(self.grammar.get().GetGrammarName().c_str())
  * 
  *         def __set__(self, name):             # <<<<<<<<<<<<<<
@@ -8471,7 +8743,7 @@ static int __pyx_pf_5_cdec_7Grammar_4name_2__set__(struct __pyx_obj_5_cdec_Gramm
   __Pyx_RefNannySetupContext("__set__", 0);
   __Pyx_INCREF(__pyx_v_name);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":214
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":214
  * 
  *         def __set__(self, name):
  *             name = as_str(name)             # <<<<<<<<<<<<<<
@@ -8484,7 +8756,7 @@ static int __pyx_pf_5_cdec_7Grammar_4name_2__set__(struct __pyx_obj_5_cdec_Gramm
   __pyx_v_name = __pyx_t_1;
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":215
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":215
  *         def __set__(self, name):
  *             name = as_str(name)
  *             self.grammar.get().SetGrammarName(name)             # <<<<<<<<<<<<<<
@@ -8514,6 +8786,9 @@ struct wrapperbase __pyx_wrapperbase_5_cdec_11TextGrammar___init__;
 #endif
 static int __pyx_pw_5_cdec_11TextGrammar_1__init__(PyObject *__pyx_v_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   PyObject *__pyx_v_rules = 0;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   int __pyx_r;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("__init__ (wrapper)", 0);
@@ -8557,7 +8832,7 @@ static int __pyx_pw_5_cdec_11TextGrammar_1__init__(PyObject *__pyx_v_self, PyObj
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":218
+/* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":218
  * 
  * cdef class TextGrammar(Grammar):
  *     def __init__(self, rules):             # <<<<<<<<<<<<<<
@@ -8581,7 +8856,7 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__init__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":220
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":220
  *     def __init__(self, rules):
  *         """TextGrammar(rules) -> SCFG Grammar containing the rules."""
  *         self.grammar = new shared_ptr[grammar.Grammar](new grammar.TextGrammar())             # <<<<<<<<<<<<<<
@@ -8590,7 +8865,7 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
  */
   __pyx_v_self->__pyx_base.grammar = new boost::shared_ptr<Grammar>(new TextGrammar());
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":221
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":221
  *         """TextGrammar(rules) -> SCFG Grammar containing the rules."""
  *         self.grammar = new shared_ptr[grammar.Grammar](new grammar.TextGrammar())
  *         cdef grammar.TextGrammar* _g = <grammar.TextGrammar*> self.grammar.get()             # <<<<<<<<<<<<<<
@@ -8599,7 +8874,7 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
  */
   __pyx_v__g = ((TextGrammar *)__pyx_v_self->__pyx_base.grammar->get());
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":222
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":222
  *         self.grammar = new shared_ptr[grammar.Grammar](new grammar.TextGrammar())
  *         cdef grammar.TextGrammar* _g = <grammar.TextGrammar*> self.grammar.get()
  *         for trule in rules:             # <<<<<<<<<<<<<<
@@ -8644,7 +8919,7 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
     __pyx_v_trule = __pyx_t_4;
     __pyx_t_4 = 0;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":223
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":223
  *         cdef grammar.TextGrammar* _g = <grammar.TextGrammar*> self.grammar.get()
  *         for trule in rules:
  *             if isinstance(trule, _sa.Rule):             # <<<<<<<<<<<<<<
@@ -8652,9 +8927,10 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
  *             elif not isinstance(trule, TRule):
  */
     __pyx_t_5 = __Pyx_TypeCheck(__pyx_v_trule, ((PyObject*)__pyx_ptype_4cdec_2sa_3_sa_Rule)); 
-    if (__pyx_t_5) {
+    __pyx_t_6 = (__pyx_t_5 != 0);
+    if (__pyx_t_6) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":224
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":224
  *         for trule in rules:
  *             if isinstance(trule, _sa.Rule):
  *                 trule = convert_rule(trule)             # <<<<<<<<<<<<<<
@@ -8670,18 +8946,18 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
       goto __pyx_L5;
     }
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":225
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":225
  *             if isinstance(trule, _sa.Rule):
  *                 trule = convert_rule(trule)
  *             elif not isinstance(trule, TRule):             # <<<<<<<<<<<<<<
  *                 raise ValueError('the grammar should contain TRule objects')
  *             _g.AddRule((<TRule> trule).rule[0])
  */
-    __pyx_t_5 = __Pyx_TypeCheck(__pyx_v_trule, ((PyObject*)__pyx_ptype_5_cdec_TRule)); 
-    __pyx_t_6 = (!__pyx_t_5);
-    if (__pyx_t_6) {
+    __pyx_t_6 = __Pyx_TypeCheck(__pyx_v_trule, ((PyObject*)__pyx_ptype_5_cdec_TRule)); 
+    __pyx_t_5 = ((!(__pyx_t_6 != 0)) != 0);
+    if (__pyx_t_5) {
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":226
+      /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":226
  *                 trule = convert_rule(trule)
  *             elif not isinstance(trule, TRule):
  *                 raise ValueError('the grammar should contain TRule objects')             # <<<<<<<<<<<<<<
@@ -8696,7 +8972,7 @@ static int __pyx_pf_5_cdec_11TextGrammar___init__(struct __pyx_obj_5_cdec_TextGr
     }
     __pyx_L5:;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":227
+    /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":227
  *             elif not isinstance(trule, TRule):
  *                 raise ValueError('the grammar should contain TRule objects')
  *             _g.AddRule((<TRule> trule).rule[0])             # <<<<<<<<<<<<<<
@@ -8727,7 +9003,7 @@ static void __pyx_pw_5_cdec_10Hypergraph_1__dealloc__(PyObject *__pyx_v_self) {
   __Pyx_RefNannyFinishContext();
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":8
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":8
  *     cdef MT19937* rng
  * 
  *     def __dealloc__(self):             # <<<<<<<<<<<<<<
@@ -8740,7 +9016,7 @@ static void __pyx_pf_5_cdec_10Hypergraph___dealloc__(struct __pyx_obj_5_cdec_Hyp
   int __pyx_t_1;
   __Pyx_RefNannySetupContext("__dealloc__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":9
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":9
  * 
  *     def __dealloc__(self):
  *         del self.hg             # <<<<<<<<<<<<<<
@@ -8749,17 +9025,17 @@ static void __pyx_pf_5_cdec_10Hypergraph___dealloc__(struct __pyx_obj_5_cdec_Hyp
  */
   delete __pyx_v_self->hg;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":10
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":10
  *     def __dealloc__(self):
  *         del self.hg
  *         if self.rng != NULL:             # <<<<<<<<<<<<<<
  *             del self.rng
  * 
  */
-  __pyx_t_1 = (__pyx_v_self->rng != NULL);
+  __pyx_t_1 = ((__pyx_v_self->rng != NULL) != 0);
   if (__pyx_t_1) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":11
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":11
  *         del self.hg
  *         if self.rng != NULL:
  *             del self.rng             # <<<<<<<<<<<<<<
@@ -8774,7 +9050,7 @@ static void __pyx_pf_5_cdec_10Hypergraph___dealloc__(struct __pyx_obj_5_cdec_Hyp
   __Pyx_RefNannyFinishContext();
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":13
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":13
  *             del self.rng
  * 
  *     cdef MT19937* _rng(self):             # <<<<<<<<<<<<<<
@@ -8792,17 +9068,17 @@ static MT19937 *__pyx_f_5_cdec_10Hypergraph__rng(struct __pyx_obj_5_cdec_Hypergr
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("_rng", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":14
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":14
  * 
  *     cdef MT19937* _rng(self):
  *         if self.rng == NULL:             # <<<<<<<<<<<<<<
  *             self.rng = new MT19937()
  *         return self.rng
  */
-  __pyx_t_1 = (__pyx_v_self->rng == NULL);
+  __pyx_t_1 = ((__pyx_v_self->rng == NULL) != 0);
   if (__pyx_t_1) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":15
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":15
  *     cdef MT19937* _rng(self):
  *         if self.rng == NULL:
  *             self.rng = new MT19937()             # <<<<<<<<<<<<<<
@@ -8820,7 +9096,7 @@ static MT19937 *__pyx_f_5_cdec_10Hypergraph__rng(struct __pyx_obj_5_cdec_Hypergr
   }
   __pyx_L3:;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":16
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":16
  *         if self.rng == NULL:
  *             self.rng = new MT19937()
  *         return self.rng             # <<<<<<<<<<<<<<
@@ -8852,7 +9128,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_3viterbi(PyObject *__pyx_v_self, C
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":18
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":18
  *         return self.rng
  * 
  *     def viterbi(self):             # <<<<<<<<<<<<<<
@@ -8871,7 +9147,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_2viterbi(struct __pyx_obj_5_cdec_H
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("viterbi", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":21
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":21
  *         """hg.viterbi() -> String for the best hypothesis in the hypergraph."""
  *         cdef vector[WordID] trans
  *         hypergraph.ViterbiESentence(self.hg[0], &trans)             # <<<<<<<<<<<<<<
@@ -8880,7 +9156,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_2viterbi(struct __pyx_obj_5_cdec_H
  */
   ViterbiESentence((__pyx_v_self->hg[0]), (&__pyx_v_trans));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":22
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":22
  *         cdef vector[WordID] trans
  *         hypergraph.ViterbiESentence(self.hg[0], &trans)
  *         return unicode(GetString(trans).c_str(), 'utf8')             # <<<<<<<<<<<<<<
@@ -8888,7 +9164,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_2viterbi(struct __pyx_obj_5_cdec_H
  *     def viterbi_trees(self):
  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_1 = PyBytes_FromString(TD::GetString(__pyx_v_trans).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 22; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyBytes_FromString(TD::GetString(__pyx_v_trans).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 22; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_1));
   __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 22; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
@@ -8930,7 +9206,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_5viterbi_trees(PyObject *__pyx_v_s
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":24
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":24
  *         return unicode(GetString(trans).c_str(), 'utf8')
  * 
  *     def viterbi_trees(self):             # <<<<<<<<<<<<<<
@@ -8950,14 +9226,14 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_4viterbi_trees(struct __pyx_obj_5_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("viterbi_trees", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":29
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":29
  *         e_tree: Target tree for the best hypothesis in the hypergraph.
  *         """
  *         f_tree = unicode(hypergraph.ViterbiFTree(self.hg[0]).c_str(), 'utf8')             # <<<<<<<<<<<<<<
  *         e_tree = unicode(hypergraph.ViterbiETree(self.hg[0]).c_str(), 'utf8')
  *         return (f_tree, e_tree)
  */
-  __pyx_t_1 = PyBytes_FromString(ViterbiFTree((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyBytes_FromString(ViterbiFTree((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_1));
   __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
@@ -8973,14 +9249,14 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_4viterbi_trees(struct __pyx_obj_5_
   __pyx_v_f_tree = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":30
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":30
  *         """
  *         f_tree = unicode(hypergraph.ViterbiFTree(self.hg[0]).c_str(), 'utf8')
  *         e_tree = unicode(hypergraph.ViterbiETree(self.hg[0]).c_str(), 'utf8')             # <<<<<<<<<<<<<<
  *         return (f_tree, e_tree)
  * 
  */
-  __pyx_t_1 = PyBytes_FromString(ViterbiETree((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 30; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyBytes_FromString(ViterbiETree((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 30; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_1));
   __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 30; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
@@ -8996,7 +9272,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_4viterbi_trees(struct __pyx_obj_5_
   __pyx_v_e_tree = ((PyObject*)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":31
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":31
  *         f_tree = unicode(hypergraph.ViterbiFTree(self.hg[0]).c_str(), 'utf8')
  *         e_tree = unicode(hypergraph.ViterbiETree(self.hg[0]).c_str(), 'utf8')
  *         return (f_tree, e_tree)             # <<<<<<<<<<<<<<
@@ -9043,7 +9319,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_7viterbi_features(PyObject *__pyx_
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":33
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":33
  *         return (f_tree, e_tree)
  * 
  *     def viterbi_features(self):             # <<<<<<<<<<<<<<
@@ -9061,20 +9337,20 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_6viterbi_features(struct __pyx_obj
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("viterbi_features", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":36
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":36
  *         """hg.viterbi_features() -> SparseVector with the features corresponding
  *         to the best derivation in the hypergraph."""
  *         cdef SparseVector fmap = SparseVector.__new__(SparseVector)             # <<<<<<<<<<<<<<
  *         fmap.vector = new FastSparseVector[weight_t](hypergraph.ViterbiFeatures(self.hg[0]))
  *         return fmap
  */
-  __pyx_t_1 = __Pyx_tp_new(((PyObject*)__pyx_ptype_5_cdec_SparseVector)); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 36; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __pyx_tp_new_5_cdec_SparseVector(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_SparseVector)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 36; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
   if (!(likely(__Pyx_TypeTest(__pyx_t_1, __pyx_ptype_5_cdec_SparseVector)))) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 36; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_v_fmap = ((struct __pyx_obj_5_cdec_SparseVector *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":37
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":37
  *         to the best derivation in the hypergraph."""
  *         cdef SparseVector fmap = SparseVector.__new__(SparseVector)
  *         fmap.vector = new FastSparseVector[weight_t](hypergraph.ViterbiFeatures(self.hg[0]))             # <<<<<<<<<<<<<<
@@ -9083,7 +9359,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_6viterbi_features(struct __pyx_obj
  */
   __pyx_v_fmap->vector = new FastSparseVector<weight_t>(ViterbiFeatures((__pyx_v_self->hg[0])));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":38
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":38
  *         cdef SparseVector fmap = SparseVector.__new__(SparseVector)
  *         fmap.vector = new FastSparseVector[weight_t](hypergraph.ViterbiFeatures(self.hg[0]))
  *         return fmap             # <<<<<<<<<<<<<<
@@ -9119,7 +9395,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_9viterbi_forest(PyObject *__pyx_v_
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":40
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":40
  *         return fmap
  * 
  *     def viterbi_forest(self):             # <<<<<<<<<<<<<<
@@ -9137,7 +9413,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_8viterbi_forest(struct __pyx_obj_5
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("viterbi_forest", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":41
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":41
  * 
  *     def viterbi_forest(self):
  *         cdef Hypergraph hg = Hypergraph()             # <<<<<<<<<<<<<<
@@ -9149,7 +9425,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_8viterbi_forest(struct __pyx_obj_5
   __pyx_v_hg = ((struct __pyx_obj_5_cdec_Hypergraph *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":42
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":42
  *     def viterbi_forest(self):
  *         cdef Hypergraph hg = Hypergraph()
  *         hg.hg = new hypergraph.Hypergraph(self.hg[0].CreateViterbiHypergraph(NULL).get()[0])             # <<<<<<<<<<<<<<
@@ -9158,7 +9434,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_8viterbi_forest(struct __pyx_obj_5
  */
   __pyx_v_hg->hg = new Hypergraph(((__pyx_v_self->hg[0]).CreateViterbiHypergraph(NULL).get()[0]));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":43
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":43
  *         cdef Hypergraph hg = Hypergraph()
  *         hg.hg = new hypergraph.Hypergraph(self.hg[0].CreateViterbiHypergraph(NULL).get()[0])
  *         return hg             # <<<<<<<<<<<<<<
@@ -9195,7 +9471,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_11viterbi_joshua(PyObject *__pyx_v
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":45
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":45
  *         return hg
  * 
  *     def viterbi_joshua(self):             # <<<<<<<<<<<<<<
@@ -9213,7 +9489,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_10viterbi_joshua(struct __pyx_obj_
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("viterbi_joshua", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":47
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":47
  *     def viterbi_joshua(self):
  *         """hg.viterbi_joshua() -> Joshua representation of the best derivation."""
  *         return unicode(hypergraph.JoshuaVisualizationString(self.hg[0]).c_str(), 'utf8')             # <<<<<<<<<<<<<<
@@ -9221,7 +9497,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_10viterbi_joshua(struct __pyx_obj_
  *     def kbest(self, size):
  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_1 = PyBytes_FromString(JoshuaVisualizationString((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __Pyx_PyBytes_FromString(JoshuaVisualizationString((__pyx_v_self->hg[0])).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_1));
   __pyx_t_2 = PyTuple_New(2); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
@@ -9264,7 +9540,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_13kbest(PyObject *__pyx_v_self, Py
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":49
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":49
  *         return unicode(hypergraph.JoshuaVisualizationString(self.hg[0]).c_str(), 'utf8')
  * 
  *     def kbest(self, size):             # <<<<<<<<<<<<<<
@@ -9280,7 +9556,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_12kbest(struct __pyx_obj_5_cdec_Hy
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("kbest", 0);
-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)__pyx_ptype_5_cdec___pyx_scope_struct_8_kbest->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_8_kbest, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)__pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest(__pyx_ptype_5_cdec___pyx_scope_struct_8_kbest, __pyx_empty_tuple, NULL);
   if (unlikely(!__pyx_cur_scope)) {
     __Pyx_RefNannyFinishContext();
     return NULL;
@@ -9320,6 +9596,9 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
   int __pyx_t_3;
   PyObject *__pyx_t_4 = NULL;
   PyObject *__pyx_t_5 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
   switch (__pyx_generator->resume_label) {
@@ -9332,7 +9611,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
   __pyx_L3_first_run:;
   if (unlikely(!__pyx_sent_value)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 49; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":51
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":51
  *     def kbest(self, size):
  *         """hg.kbest(size) -> List of k-best hypotheses in the hypergraph."""
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.ESentenceTraversal]* derivations = new kbest.KBestDerivations[vector[WordID], kbest.ESentenceTraversal](self.hg[0], size)             # <<<<<<<<<<<<<<
@@ -9342,7 +9621,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
   __pyx_t_1 = __Pyx_PyInt_AsUnsignedInt(__pyx_cur_scope->__pyx_v_size); if (unlikely((__pyx_t_1 == (unsigned int)-1) && PyErr_Occurred())) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 51; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_cur_scope->__pyx_v_derivations = new KBest::KBestDerivations<std::vector<WordID>,ESentenceTraversal>((__pyx_cur_scope->__pyx_v_self->hg[0]), __pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":54
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":54
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.ESentenceTraversal].Derivation* derivation
  *         cdef unsigned k
  *         try:             # <<<<<<<<<<<<<<
@@ -9351,7 +9630,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":55
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":55
  *         cdef unsigned k
  *         try:
  *             for k in range(size):             # <<<<<<<<<<<<<<
@@ -9362,7 +9641,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
     for (__pyx_t_1 = 0; __pyx_t_1 < __pyx_t_2; __pyx_t_1+=1) {
       __pyx_cur_scope->__pyx_v_k = __pyx_t_1;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":56
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":56
  *         try:
  *             for k in range(size):
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)             # <<<<<<<<<<<<<<
@@ -9371,28 +9650,28 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
  */
       __pyx_cur_scope->__pyx_v_derivation = __pyx_cur_scope->__pyx_v_derivations->LazyKthBest((__pyx_cur_scope->__pyx_v_self->hg->nodes_.size() - 1), __pyx_cur_scope->__pyx_v_k);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":57
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":57
  *             for k in range(size):
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not derivation: break             # <<<<<<<<<<<<<<
  *                 yield unicode(GetString(derivation._yield).c_str(), 'utf8')
  *         finally:
  */
-      __pyx_t_3 = (!(__pyx_cur_scope->__pyx_v_derivation != 0));
+      __pyx_t_3 = ((!(__pyx_cur_scope->__pyx_v_derivation != 0)) != 0);
       if (__pyx_t_3) {
         goto __pyx_L8_break;
         goto __pyx_L9;
       }
       __pyx_L9:;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":58
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":58
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not derivation: break
  *                 yield unicode(GetString(derivation._yield).c_str(), 'utf8')             # <<<<<<<<<<<<<<
  *         finally:
  *             del derivations
  */
-      __pyx_t_4 = PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_derivation->yield).c_str()); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 58; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_4 = __Pyx_PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_derivation->yield).c_str()); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 58; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_4));
       __pyx_t_5 = PyTuple_New(2); if (unlikely(!__pyx_t_5)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 58; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(__pyx_t_5);
@@ -9422,7 +9701,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_14generator4(__pyx_GeneratorObject
     __pyx_L8_break:;
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":60
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":60
  *                 yield unicode(GetString(derivation._yield).c_str(), 'utf8')
  *         finally:
  *             del derivations             # <<<<<<<<<<<<<<
@@ -9483,7 +9762,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_16kbest_trees(PyObject *__pyx_v_se
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":62
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":62
  *             del derivations
  * 
  *     def kbest_trees(self, size):             # <<<<<<<<<<<<<<
@@ -9499,7 +9778,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_15kbest_trees(struct __pyx_obj_5_c
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("kbest_trees", 0);
-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)__pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)__pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees(__pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees, __pyx_empty_tuple, NULL);
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     __Pyx_RefNannyFinishContext();
     return NULL;
@@ -9541,6 +9820,9 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
   int __pyx_t_5;
   PyObject *__pyx_t_6 = NULL;
   PyObject *__pyx_t_7 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
   switch (__pyx_generator->resume_label) {
@@ -9553,7 +9835,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
   __pyx_L3_first_run:;
   if (unlikely(!__pyx_sent_value)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":64
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":64
  *     def kbest_trees(self, size):
  *         """hg.kbest_trees(size) -> List of k-best trees in the hypergraph."""
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.FTreeTraversal]* f_derivations = new kbest.KBestDerivations[vector[WordID], kbest.FTreeTraversal](self.hg[0], size)             # <<<<<<<<<<<<<<
@@ -9563,7 +9845,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
   __pyx_t_1 = __Pyx_PyInt_AsUnsignedInt(__pyx_cur_scope->__pyx_v_size); if (unlikely((__pyx_t_1 == (unsigned int)-1) && PyErr_Occurred())) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 64; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_cur_scope->__pyx_v_f_derivations = new KBest::KBestDerivations<std::vector<WordID>,FTreeTraversal>((__pyx_cur_scope->__pyx_v_self->hg[0]), __pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":66
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":66
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.FTreeTraversal]* f_derivations = new kbest.KBestDerivations[vector[WordID], kbest.FTreeTraversal](self.hg[0], size)
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.FTreeTraversal].Derivation* f_derivation
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.ETreeTraversal]* e_derivations = new kbest.KBestDerivations[vector[WordID], kbest.ETreeTraversal](self.hg[0], size)             # <<<<<<<<<<<<<<
@@ -9573,7 +9855,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
   __pyx_t_1 = __Pyx_PyInt_AsUnsignedInt(__pyx_cur_scope->__pyx_v_size); if (unlikely((__pyx_t_1 == (unsigned int)-1) && PyErr_Occurred())) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 66; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_cur_scope->__pyx_v_e_derivations = new KBest::KBestDerivations<std::vector<WordID>,ETreeTraversal>((__pyx_cur_scope->__pyx_v_self->hg[0]), __pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":69
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":69
  *         cdef kbest.KBestDerivations[vector[WordID], kbest.ETreeTraversal].Derivation* e_derivation
  *         cdef unsigned k
  *         try:             # <<<<<<<<<<<<<<
@@ -9582,7 +9864,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":70
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":70
  *         cdef unsigned k
  *         try:
  *             for k in range(size):             # <<<<<<<<<<<<<<
@@ -9593,7 +9875,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
     for (__pyx_t_1 = 0; __pyx_t_1 < __pyx_t_2; __pyx_t_1+=1) {
       __pyx_cur_scope->__pyx_v_k = __pyx_t_1;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":71
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":71
  *         try:
  *             for k in range(size):
  *                 f_derivation = f_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)             # <<<<<<<<<<<<<<
@@ -9602,7 +9884,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
  */
       __pyx_cur_scope->__pyx_v_f_derivation = __pyx_cur_scope->__pyx_v_f_derivations->LazyKthBest((__pyx_cur_scope->__pyx_v_self->hg->nodes_.size() - 1), __pyx_cur_scope->__pyx_v_k);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":72
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":72
  *             for k in range(size):
  *                 f_derivation = f_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 e_derivation = e_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)             # <<<<<<<<<<<<<<
@@ -9611,16 +9893,16 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
  */
       __pyx_cur_scope->__pyx_v_e_derivation = __pyx_cur_scope->__pyx_v_e_derivations->LazyKthBest((__pyx_cur_scope->__pyx_v_self->hg->nodes_.size() - 1), __pyx_cur_scope->__pyx_v_k);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":73
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":73
  *                 f_derivation = f_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 e_derivation = e_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not f_derivation or not e_derivation: break             # <<<<<<<<<<<<<<
  *                 f_tree = unicode(GetString(f_derivation._yield).c_str(), 'utf8')
  *                 e_tree = unicode(GetString(e_derivation._yield).c_str(), 'utf8')
  */
-      __pyx_t_3 = (!(__pyx_cur_scope->__pyx_v_f_derivation != 0));
+      __pyx_t_3 = ((!(__pyx_cur_scope->__pyx_v_f_derivation != 0)) != 0);
       if (!__pyx_t_3) {
-        __pyx_t_4 = (!(__pyx_cur_scope->__pyx_v_e_derivation != 0));
+        __pyx_t_4 = ((!(__pyx_cur_scope->__pyx_v_e_derivation != 0)) != 0);
         __pyx_t_5 = __pyx_t_4;
       } else {
         __pyx_t_5 = __pyx_t_3;
@@ -9631,14 +9913,14 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
       }
       __pyx_L9:;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":74
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":74
  *                 e_derivation = e_derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not f_derivation or not e_derivation: break
  *                 f_tree = unicode(GetString(f_derivation._yield).c_str(), 'utf8')             # <<<<<<<<<<<<<<
  *                 e_tree = unicode(GetString(e_derivation._yield).c_str(), 'utf8')
  *                 yield (f_tree, e_tree)
  */
-      __pyx_t_6 = PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_f_derivation->yield).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 74; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_6 = __Pyx_PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_f_derivation->yield).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 74; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_6));
       __pyx_t_7 = PyTuple_New(2); if (unlikely(!__pyx_t_7)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 74; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(__pyx_t_7);
@@ -9657,14 +9939,14 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
       __pyx_cur_scope->__pyx_v_f_tree = ((PyObject*)__pyx_t_6);
       __pyx_t_6 = 0;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":75
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":75
  *                 if not f_derivation or not e_derivation: break
  *                 f_tree = unicode(GetString(f_derivation._yield).c_str(), 'utf8')
  *                 e_tree = unicode(GetString(e_derivation._yield).c_str(), 'utf8')             # <<<<<<<<<<<<<<
  *                 yield (f_tree, e_tree)
  *         finally:
  */
-      __pyx_t_6 = PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_e_derivation->yield).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 75; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_6 = __Pyx_PyBytes_FromString(TD::GetString(__pyx_cur_scope->__pyx_v_e_derivation->yield).c_str()); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 75; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(((PyObject *)__pyx_t_6));
       __pyx_t_7 = PyTuple_New(2); if (unlikely(!__pyx_t_7)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 75; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(__pyx_t_7);
@@ -9683,7 +9965,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
       __pyx_cur_scope->__pyx_v_e_tree = ((PyObject*)__pyx_t_6);
       __pyx_t_6 = 0;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":76
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":76
  *                 f_tree = unicode(GetString(f_derivation._yield).c_str(), 'utf8')
  *                 e_tree = unicode(GetString(e_derivation._yield).c_str(), 'utf8')
  *                 yield (f_tree, e_tree)             # <<<<<<<<<<<<<<
@@ -9715,7 +9997,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
     __pyx_L8_break:;
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":78
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":78
  *                 yield (f_tree, e_tree)
  *         finally:
  *             del f_derivations             # <<<<<<<<<<<<<<
@@ -9739,7 +10021,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_17generator5(__pyx_GeneratorObject
     __pyx_L6:;
     delete __pyx_cur_scope->__pyx_v_f_derivations;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":79
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":79
  *         finally:
  *             del f_derivations
  *             del e_derivations             # <<<<<<<<<<<<<<
@@ -9785,7 +10067,7 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_19kbest_features(PyObject *__pyx_v
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":81
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":81
  *             del e_derivations
  * 
  *     def kbest_features(self, size):             # <<<<<<<<<<<<<<
@@ -9801,7 +10083,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_18kbest_features(struct __pyx_obj_
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("kbest_features", 0);
-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)__pyx_ptype_5_cdec___pyx_scope_struct_10_kbest_features->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_10_kbest_features, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)__pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features(__pyx_ptype_5_cdec___pyx_scope_struct_10_kbest_features, __pyx_empty_tuple, NULL);
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     return NULL;
@@ -9840,6 +10122,9 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
   long __pyx_t_2;
   int __pyx_t_3;
   PyObject *__pyx_t_4 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
   switch (__pyx_generator->resume_label) {
@@ -9852,7 +10137,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
   __pyx_L3_first_run:;
   if (unlikely(!__pyx_sent_value)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 81; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":83
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":83
  *     def kbest_features(self, size):
  *         """hg.kbest_trees(size) -> List of k-best feature vectors in the hypergraph."""
  *         cdef kbest.KBestDerivations[FastSparseVector[weight_t], kbest.FeatureVectorTraversal]* derivations = new kbest.KBestDerivations[FastSparseVector[weight_t], kbest.FeatureVectorTraversal](self.hg[0], size)             # <<<<<<<<<<<<<<
@@ -9862,7 +10147,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
   __pyx_t_1 = __Pyx_PyInt_AsUnsignedInt(__pyx_cur_scope->__pyx_v_size); if (unlikely((__pyx_t_1 == (unsigned int)-1) && PyErr_Occurred())) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 83; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_cur_scope->__pyx_v_derivations = new KBest::KBestDerivations<FastSparseVector<weight_t>,FeatureVectorTraversal>((__pyx_cur_scope->__pyx_v_self->hg[0]), __pyx_t_1);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":87
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":87
  *         cdef SparseVector fmap
  *         cdef unsigned k
  *         try:             # <<<<<<<<<<<<<<
@@ -9871,7 +10156,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":88
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":88
  *         cdef unsigned k
  *         try:
  *             for k in range(size):             # <<<<<<<<<<<<<<
@@ -9882,7 +10167,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
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       __pyx_cur_scope->__pyx_v_k = __pyx_t_1;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":89
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":89
  *         try:
  *             for k in range(size):
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)             # <<<<<<<<<<<<<<
@@ -9891,28 +10176,28 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
  */
       __pyx_cur_scope->__pyx_v_derivation = __pyx_cur_scope->__pyx_v_derivations->LazyKthBest((__pyx_cur_scope->__pyx_v_self->hg->nodes_.size() - 1), __pyx_cur_scope->__pyx_v_k);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":90
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":90
  *             for k in range(size):
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not derivation: break             # <<<<<<<<<<<<<<
  *                 fmap = SparseVector.__new__(SparseVector)
  *                 fmap.vector = new FastSparseVector[weight_t](derivation._yield)
  */
-      __pyx_t_3 = (!(__pyx_cur_scope->__pyx_v_derivation != 0));
+      __pyx_t_3 = ((!(__pyx_cur_scope->__pyx_v_derivation != 0)) != 0);
       if (__pyx_t_3) {
         goto __pyx_L8_break;
         goto __pyx_L9;
       }
       __pyx_L9:;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":91
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":91
  *                 derivation = derivations.LazyKthBest(self.hg.nodes_.size() - 1, k)
  *                 if not derivation: break
  *                 fmap = SparseVector.__new__(SparseVector)             # <<<<<<<<<<<<<<
  *                 fmap.vector = new FastSparseVector[weight_t](derivation._yield)
  *                 yield fmap
  */
-      __pyx_t_4 = __Pyx_tp_new(((PyObject*)__pyx_ptype_5_cdec_SparseVector)); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 91; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_4 = __pyx_tp_new_5_cdec_SparseVector(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_SparseVector)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 91; __pyx_clineno = __LINE__; goto __pyx_L5;}
       __Pyx_GOTREF(__pyx_t_4);
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       __Pyx_XGOTREF(((PyObject *)__pyx_cur_scope->__pyx_v_fmap));
@@ -9921,7 +10206,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
       __pyx_cur_scope->__pyx_v_fmap = ((struct __pyx_obj_5_cdec_SparseVector *)__pyx_t_4);
       __pyx_t_4 = 0;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":92
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":92
  *                 if not derivation: break
  *                 fmap = SparseVector.__new__(SparseVector)
  *                 fmap.vector = new FastSparseVector[weight_t](derivation._yield)             # <<<<<<<<<<<<<<
@@ -9930,7 +10215,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
  */
       __pyx_cur_scope->__pyx_v_fmap->vector = new FastSparseVector<weight_t>(__pyx_cur_scope->__pyx_v_derivation->yield);
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":93
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":93
  *                 fmap = SparseVector.__new__(SparseVector)
  *                 fmap.vector = new FastSparseVector[weight_t](derivation._yield)
  *                 yield fmap             # <<<<<<<<<<<<<<
@@ -9954,7 +10239,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_20generator6(__pyx_GeneratorObject
     __pyx_L8_break:;
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":95
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":95
  *                 yield fmap
  *         finally:
  *             del derivations             # <<<<<<<<<<<<<<
@@ -10006,6 +10291,9 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_22sample(PyObject *__pyx_v_self, P
 static char __pyx_doc_5_cdec_10Hypergraph_21sample[] = "hg.sample(n) -> Sample of n hypotheses from the hypergraph.";
 static PyObject *__pyx_pw_5_cdec_10Hypergraph_22sample(PyObject *__pyx_v_self, PyObject *__pyx_arg_n) {
   unsigned int __pyx_v_n;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
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   __Pyx_RefNannyDeclarations
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":97
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":97
  *             del derivations
  * 
  *     def sample(self, unsigned n):             # <<<<<<<<<<<<<<
@@ -10039,7 +10327,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_21sample(struct __pyx_obj_5_cdec_H
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   int __pyx_clineno = 0;
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)__pyx_tp_new_5_cdec___pyx_scope_struct_11_sample(__pyx_ptype_5_cdec___pyx_scope_struct_11_sample, __pyx_empty_tuple, NULL);
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@@ -10077,6 +10365,9 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
   unsigned int __pyx_t_3;
   PyObject *__pyx_t_4 = NULL;
   PyObject *__pyx_t_5 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
   switch (__pyx_generator->resume_label) {
@@ -10089,7 +10380,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
   __pyx_L3_first_run:;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":99
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":99
  *     def sample(self, unsigned n):
  *         """hg.sample(n) -> Sample of n hypotheses from the hypergraph."""
  *         cdef vector[hypergraph.Hypothesis]* hypos = new vector[hypergraph.Hypothesis]()             # <<<<<<<<<<<<<<
@@ -10104,7 +10395,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
   }
   __pyx_cur_scope->__pyx_v_hypos = __pyx_t_1;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":100
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":100
  *         """hg.sample(n) -> Sample of n hypotheses from the hypergraph."""
  *         cdef vector[hypergraph.Hypothesis]* hypos = new vector[hypergraph.Hypothesis]()
  *         hypergraph.sample_hypotheses(self.hg[0], n, self._rng(), hypos)             # <<<<<<<<<<<<<<
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  */
   HypergraphSampler::sample_hypotheses((__pyx_cur_scope->__pyx_v_self->hg[0]), __pyx_cur_scope->__pyx_v_n, ((struct __pyx_vtabstruct_5_cdec_Hypergraph *)__pyx_cur_scope->__pyx_v_self->__pyx_vtab)->_rng(__pyx_cur_scope->__pyx_v_self), __pyx_cur_scope->__pyx_v_hypos);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":102
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":102
  *         hypergraph.sample_hypotheses(self.hg[0], n, self._rng(), hypos)
  *         cdef unsigned k
  *         try:             # <<<<<<<<<<<<<<
@@ -10122,7 +10413,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":103
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":103
  *         cdef unsigned k
  *         try:
  *             for k in range(hypos.size()):             # <<<<<<<<<<<<<<
@@ -10133,14 +10424,14 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
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       __pyx_cur_scope->__pyx_v_k = __pyx_t_3;
 
-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":104
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":104
  *         try:
  *             for k in range(hypos.size()):
  *                 yield unicode(GetString(hypos[0][k].words).c_str(), 'utf8')             # <<<<<<<<<<<<<<
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  *             del hypos
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-      __pyx_t_4 = PyBytes_FromString(TD::GetString(((__pyx_cur_scope->__pyx_v_hypos[0])[__pyx_cur_scope->__pyx_v_k]).words).c_str()); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 104; __pyx_clineno = __LINE__; goto __pyx_L5;}
+      __pyx_t_4 = __Pyx_PyBytes_FromString(TD::GetString(((__pyx_cur_scope->__pyx_v_hypos[0])[__pyx_cur_scope->__pyx_v_k]).words).c_str()); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 104; __pyx_clineno = __LINE__; goto __pyx_L5;}
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@@ -10169,7 +10460,7 @@ static PyObject *__pyx_gb_5_cdec_10Hypergraph_23generator7(__pyx_GeneratorObject
     }
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":106
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":106
  *                 yield unicode(GetString(hypos[0][k].words).c_str(), 'utf8')
  *         finally:
  *             del hypos             # <<<<<<<<<<<<<<
@@ -10223,6 +10514,9 @@ static PyObject *__pyx_pw_5_cdec_10Hypergraph_25sample_trees(PyObject *__pyx_v_s
 static char __pyx_doc_5_cdec_10Hypergraph_24sample_trees[] = "hg.sample_trees(n) -> Sample of n trees from the hypergraph.";
 static PyObject *__pyx_pw_5_cdec_10Hypergraph_25sample_trees(PyObject *__pyx_v_self, PyObject *__pyx_arg_n) {
   unsigned int __pyx_v_n;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":108
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":108
  *             del hypos
  * 
  *     def sample_trees(self, unsigned n):             # <<<<<<<<<<<<<<
@@ -10256,7 +10550,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_24sample_trees(struct __pyx_obj_5_
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)__pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees(__pyx_ptype_5_cdec___pyx_scope_struct_12_sample_trees, __pyx_empty_tuple, NULL);
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   PyObject *__pyx_t_4 = NULL;
   PyObject *__pyx_t_5 = NULL;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":110
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":110
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":111
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":111
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":113
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":113
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  */
   /*try:*/ {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":114
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":114
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":115
+      /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":115
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":117
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":117
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":119
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":119
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  * 
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":122
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-  if (__pyx_t_1) {
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+  if (__pyx_t_2) {
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":123
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":123
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":124
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+  __pyx_t_1 = (__pyx_t_2 != 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":125
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":125
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":127
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":128
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":128
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":130
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":134
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":135
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":136
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":137
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":137
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":138
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":139
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":139
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":140
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":140
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":142
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":142
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":144
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":145
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":145
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":147
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":147
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  *     def plf(self):             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":149
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":149
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  *         """hg.plf() -> Lattice PLF representation corresponding to the hypergraph."""
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":151
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-  if (__pyx_t_1) {
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":154
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":155
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":156
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":158
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":161
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":163
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":164
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":167
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":169
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":170
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":170
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":173
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":174
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":174
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":177
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":178
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":178
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":180
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":182
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":183
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":184
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  *         cdef FastSparseVector[prob_t]* result = new FastSparseVector[prob_t]()
  *         cdef prob_t z = hypergraph.InsideOutside(self.hg[0], result)
  *         result[0] /= z             # <<<<<<<<<<<<<<
@@ -11450,20 +11764,20 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
   (__pyx_v_result[0]) /= __pyx_v_z;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":185
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":185
  *         cdef prob_t z = hypergraph.InsideOutside(self.hg[0], result)
  *         result[0] /= z
  *         cdef SparseVector vector = SparseVector.__new__(SparseVector)             # <<<<<<<<<<<<<<
  *         vector.vector = new FastSparseVector[double]()
  *         cdef FastSparseVector[prob_t].const_iterator* it = new FastSparseVector[prob_t].const_iterator(result[0], False)
  */
-  __pyx_t_1 = __Pyx_tp_new(((PyObject*)__pyx_ptype_5_cdec_SparseVector)); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 185; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __pyx_tp_new_5_cdec_SparseVector(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_SparseVector)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 185; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
   if (!(likely(__Pyx_TypeTest(__pyx_t_1, __pyx_ptype_5_cdec_SparseVector)))) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 185; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_v_vector = ((struct __pyx_obj_5_cdec_SparseVector *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":186
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":186
  *         result[0] /= z
  *         cdef SparseVector vector = SparseVector.__new__(SparseVector)
  *         vector.vector = new FastSparseVector[double]()             # <<<<<<<<<<<<<<
@@ -11472,7 +11786,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
   __pyx_v_vector->vector = new FastSparseVector<double>();
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":187
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":187
  *         cdef SparseVector vector = SparseVector.__new__(SparseVector)
  *         vector.vector = new FastSparseVector[double]()
  *         cdef FastSparseVector[prob_t].const_iterator* it = new FastSparseVector[prob_t].const_iterator(result[0], False)             # <<<<<<<<<<<<<<
@@ -11481,7 +11795,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
   __pyx_v_it = new FastSparseVector<prob_t>::const_iterator((__pyx_v_result[0]), 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":189
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":189
  *         cdef FastSparseVector[prob_t].const_iterator* it = new FastSparseVector[prob_t].const_iterator(result[0], False)
  *         cdef unsigned i
  *         for i in range(result.size()):             # <<<<<<<<<<<<<<
@@ -11492,7 +11806,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
   for (__pyx_t_3 = 0; __pyx_t_3 < __pyx_t_2; __pyx_t_3+=1) {
     __pyx_v_i = __pyx_t_3;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":190
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":190
  *         cdef unsigned i
  *         for i in range(result.size()):
  *             vector.vector.set_value(it[0].ptr().first, log(it[0].ptr().second))             # <<<<<<<<<<<<<<
@@ -11501,7 +11815,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
     __pyx_v_vector->vector->set_value((__pyx_v_it[0]).operator->()->first, log((__pyx_v_it[0]).operator->()->second));
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":191
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":191
  *         for i in range(result.size()):
  *             vector.vector.set_value(it[0].ptr().first, log(it[0].ptr().second))
  *             pinc(it[0]) # ++it             # <<<<<<<<<<<<<<
@@ -11511,7 +11825,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
     (++(__pyx_v_it[0]));
   }
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":192
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":192
  *             vector.vector.set_value(it[0].ptr().first, log(it[0].ptr().second))
  *             pinc(it[0]) # ++it
  *         del it             # <<<<<<<<<<<<<<
@@ -11520,7 +11834,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
   delete __pyx_v_it;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":193
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":193
  *             pinc(it[0]) # ++it
  *         del it
  *         del result             # <<<<<<<<<<<<<<
@@ -11529,7 +11843,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
  */
   delete __pyx_v_result;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":194
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":194
  *         del it
  *         del result
  *         return vector             # <<<<<<<<<<<<<<
@@ -11554,7 +11868,7 @@ static PyObject *__pyx_pf_5_cdec_10Hypergraph_37inside_outside(struct __pyx_obj_
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":201
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":201
  *     cdef public TRule trule
  * 
  *     cdef init(self, hypergraph.Hypergraph* hg, unsigned i):             # <<<<<<<<<<<<<<
@@ -11571,7 +11885,7 @@ static PyObject *__pyx_f_5_cdec_14HypergraphEdge_init(struct __pyx_obj_5_cdec_Hy
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("init", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":202
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":202
  * 
  *     cdef init(self, hypergraph.Hypergraph* hg, unsigned i):
  *         self.hg = hg             # <<<<<<<<<<<<<<
@@ -11580,7 +11894,7 @@ static PyObject *__pyx_f_5_cdec_14HypergraphEdge_init(struct __pyx_obj_5_cdec_Hy
  */
   __pyx_v_self->hg = __pyx_v_hg;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":203
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":203
  *     cdef init(self, hypergraph.Hypergraph* hg, unsigned i):
  *         self.hg = hg
  *         self.edge = &hg.edges_[i]             # <<<<<<<<<<<<<<
@@ -11589,14 +11903,14 @@ static PyObject *__pyx_f_5_cdec_14HypergraphEdge_init(struct __pyx_obj_5_cdec_Hy
  */
   __pyx_v_self->edge = (&(__pyx_v_hg->edges_[__pyx_v_i]));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":204
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":204
  *         self.hg = hg
  *         self.edge = &hg.edges_[i]
  *         self.trule = TRule.__new__(TRule)             # <<<<<<<<<<<<<<
  *         self.trule.rule = new shared_ptr[grammar.TRule](self.edge.rule_)
  *         return self
  */
-  __pyx_t_1 = __Pyx_tp_new(((PyObject*)__pyx_ptype_5_cdec_TRule)); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 204; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __pyx_tp_new_5_cdec_TRule(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_TRule)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 204; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
   if (!(likely(__Pyx_TypeTest(__pyx_t_1, __pyx_ptype_5_cdec_TRule)))) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 204; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GIVEREF(__pyx_t_1);
@@ -11605,7 +11919,7 @@ static PyObject *__pyx_f_5_cdec_14HypergraphEdge_init(struct __pyx_obj_5_cdec_Hy
   __pyx_v_self->trule = ((struct __pyx_obj_5_cdec_TRule *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":205
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":205
  *         self.edge = &hg.edges_[i]
  *         self.trule = TRule.__new__(TRule)
  *         self.trule.rule = new shared_ptr[grammar.TRule](self.edge.rule_)             # <<<<<<<<<<<<<<
@@ -11614,7 +11928,7 @@ static PyObject *__pyx_f_5_cdec_14HypergraphEdge_init(struct __pyx_obj_5_cdec_Hy
  */
   __pyx_v_self->trule->rule = new boost::shared_ptr<TRule>(__pyx_v_self->edge->rule_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":206
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":206
  *         self.trule = TRule.__new__(TRule)
  *         self.trule.rule = new shared_ptr[grammar.TRule](self.edge.rule_)
  *         return self             # <<<<<<<<<<<<<<
@@ -11649,7 +11963,7 @@ static Py_ssize_t __pyx_pw_5_cdec_14HypergraphEdge_1__len__(PyObject *__pyx_v_se
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":208
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":208
  *         return self
  * 
  *     def __len__(self):             # <<<<<<<<<<<<<<
@@ -11662,7 +11976,7 @@ static Py_ssize_t __pyx_pf_5_cdec_14HypergraphEdge___len__(struct __pyx_obj_5_cd
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   __Pyx_RefNannySetupContext("__len__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":209
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":209
  * 
  *     def __len__(self):
  *         return self.edge.tail_nodes_.size()             # <<<<<<<<<<<<<<
@@ -11689,7 +12003,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_9head_node_1__get__(PyObject *
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":212
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":212
  * 
  *     property head_node:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -11707,7 +12021,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_9head_node___get__(struct __py
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":213
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":213
  *     property head_node:
  *         def __get__(self):
  *             return HypergraphNode().init(self.hg, self.edge.head_node_)             # <<<<<<<<<<<<<<
@@ -11749,7 +12063,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_10tail_nodes_1__get__(PyObject
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":216
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":216
  * 
  *     property tail_nodes:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -11765,7 +12079,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_10tail_nodes___get__(struct __
   const char *__pyx_filename = NULL;
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
-  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)__pyx_ptype_5_cdec___pyx_scope_struct_15___get__->tp_new(__pyx_ptype_5_cdec___pyx_scope_struct_15___get__, __pyx_empty_tuple, NULL);
+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_15___get__(__pyx_ptype_5_cdec___pyx_scope_struct_15___get__, __pyx_empty_tuple, NULL);
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@@ -11801,6 +12115,9 @@ static PyObject *__pyx_gb_5_cdec_14HypergraphEdge_10tail_nodes_2generator11(__py
   unsigned int __pyx_t_2;
   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("None", 0);
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@@ -11813,7 +12130,7 @@ static PyObject *__pyx_gb_5_cdec_14HypergraphEdge_10tail_nodes_2generator11(__py
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":218
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":218
  *         def __get__(self):
  *             cdef unsigned i
  *             for i in range(self.edge.tail_nodes_.size()):             # <<<<<<<<<<<<<<
@@ -11824,7 +12141,7 @@ static PyObject *__pyx_gb_5_cdec_14HypergraphEdge_10tail_nodes_2generator11(__py
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     __pyx_cur_scope->__pyx_v_i = __pyx_t_2;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":219
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":219
  *             cdef unsigned i
  *             for i in range(self.edge.tail_nodes_.size()):
  *                 yield HypergraphNode().init(self.hg, self.edge.tail_nodes_[i])             # <<<<<<<<<<<<<<
@@ -11875,7 +12192,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_4span_1__get__(PyObject *__pyx
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":222
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":222
  * 
  *     property span:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -11894,7 +12211,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_4span___get__(struct __pyx_obj
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":223
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":223
  *     property span:
  *         def __get__(self):
  *             return (self.edge.i_, self.edge.j_)             # <<<<<<<<<<<<<<
@@ -11943,7 +12260,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_8src_span_1__get__(PyObject *_
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":226
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":226
  * 
  *     property src_span:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -11962,7 +12279,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_8src_span___get__(struct __pyx
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   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":227
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":227
  *     property src_span:
  *         def __get__(self):
  *             return (self.edge.prev_i_, self.edge.prev_j_)             # <<<<<<<<<<<<<<
@@ -12011,7 +12328,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_14feature_values_1__get__(PyOb
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":230
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":230
  * 
  *     property feature_values:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -12029,20 +12346,20 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_14feature_values___get__(struc
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__get__", 0);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":231
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":231
  *     property feature_values:
  *         def __get__(self):
  *             cdef SparseVector vector = SparseVector.__new__(SparseVector)             # <<<<<<<<<<<<<<
  *             vector.vector = new FastSparseVector[double](self.edge.feature_values_)
  *             return vector
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-  __pyx_t_1 = __Pyx_tp_new(((PyObject*)__pyx_ptype_5_cdec_SparseVector)); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 231; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = __pyx_tp_new_5_cdec_SparseVector(((PyTypeObject *)((PyObject*)__pyx_ptype_5_cdec_SparseVector)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 231; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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   if (!(likely(__Pyx_TypeTest(__pyx_t_1, __pyx_ptype_5_cdec_SparseVector)))) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 231; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_v_vector = ((struct __pyx_obj_5_cdec_SparseVector *)__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":232
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":232
  *         def __get__(self):
  *             cdef SparseVector vector = SparseVector.__new__(SparseVector)
  *             vector.vector = new FastSparseVector[double](self.edge.feature_values_)             # <<<<<<<<<<<<<<
@@ -12051,7 +12368,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_14feature_values___get__(struc
  */
   __pyx_v_vector->vector = new FastSparseVector<double>(__pyx_v_self->edge->feature_values_);
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":233
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":233
  *             cdef SparseVector vector = SparseVector.__new__(SparseVector)
  *             vector.vector = new FastSparseVector[double](self.edge.feature_values_)
  *             return vector             # <<<<<<<<<<<<<<
@@ -12087,7 +12404,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_4prob_1__get__(PyObject *__pyx
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":236
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":236
  * 
  *     property prob:
  *         def __get__(self):             # <<<<<<<<<<<<<<
@@ -12104,7 +12421,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_4prob___get__(struct __pyx_obj
   int __pyx_clineno = 0;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":237
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":237
  *     property prob:
  *         def __get__(self):
  *             return self.edge.edge_prob_.as_float()             # <<<<<<<<<<<<<<
@@ -12133,6 +12450,9 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_4prob___get__(struct __pyx_obj
 /* Python wrapper */
 static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_3__richcmp__(PyObject *__pyx_v_x, PyObject *__pyx_v_y, int __pyx_v_op); /*proto*/
 static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_3__richcmp__(PyObject *__pyx_v_x, PyObject *__pyx_v_y, int __pyx_v_op) {
+  CYTHON_UNUSED int __pyx_lineno = 0;
+  CYTHON_UNUSED const char *__pyx_filename = NULL;
+  CYTHON_UNUSED int __pyx_clineno = 0;
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   __Pyx_RefNannyDeclarations
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@@ -12147,7 +12467,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphEdge_3__richcmp__(PyObject *__pyx_v
   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":239
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":239
  *             return self.edge.edge_prob_.as_float()
  * 
  *     def __richcmp__(HypergraphEdge x, HypergraphEdge y, int op):             # <<<<<<<<<<<<<<
@@ -12165,7 +12485,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_2__richcmp__(struct __pyx_obj_
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":242
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":242
  *         if op == 2: # ==
  *             return x.edge == y.edge
  *         elif op == 3: # !=             # <<<<<<<<<<<<<<
@@ -12174,7 +12494,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_2__richcmp__(struct __pyx_obj_
  */
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":240
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":240
  * 
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@@ -12183,7 +12503,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_2__richcmp__(struct __pyx_obj_
  */
     case 2:
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":241
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":241
  *     def __richcmp__(HypergraphEdge x, HypergraphEdge y, int op):
  *         if op == 2: # ==
  *             return x.edge == y.edge             # <<<<<<<<<<<<<<
@@ -12198,7 +12518,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphEdge_2__richcmp__(struct __pyx_obj_
     goto __pyx_L0;
     break;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":242
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":242
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  *             return x.edge == y.edge
  *         elif op == 3: # !=             # <<<<<<<<<<<<<<
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  */
     case 3:
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":243
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":243
  *             return x.edge == y.edge
  *         elif op == 3: # !=
  *             return not (x == y)             # <<<<<<<<<<<<<<
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     break;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":244
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":244
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  *             return not (x == y)
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":199
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":199
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   return __pyx_r;
 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":250
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":250
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  *     cdef init(self, hypergraph.Hypergraph* hg, unsigned i):             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":251
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":252
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":252
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":253
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":253
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   return __pyx_r;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":256
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":256
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  *     property in_edges:
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_16___get__(__pyx_ptype_5_cdec___pyx_scope_struct_16___get__, __pyx_empty_tuple, NULL);
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   unsigned int __pyx_t_2;
   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":258
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":259
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":259
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@@ -12536,7 +12859,7 @@ static PyObject *__pyx_pw_5_cdec_14HypergraphNode_9out_edges_1__get__(PyObject *
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":262
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":262
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  *     property out_edges:
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_17___get__(__pyx_ptype_5_cdec___pyx_scope_struct_17___get__, __pyx_empty_tuple, NULL);
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   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":264
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":265
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":265
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":268
+/* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":268
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":269
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":269
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":272
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":273
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":274
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@@ -12779,8 +13107,8 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphNode_3cat___get__(struct __pyx_obj_
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 static PyObject *__pyx_pw_5_cdec_14HypergraphNode_1__richcmp__(PyObject *__pyx_v_x, PyObject *__pyx_v_y, int __pyx_v_op) {
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-/* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":276
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":279
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":277
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":278
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@@ -12857,7 +13188,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphNode___richcmp__(struct __pyx_obj_5
     goto __pyx_L0;
     break;
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":279
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":279
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@@ -12866,7 +13197,7 @@ static PyObject *__pyx_pf_5_cdec_14HypergraphNode___richcmp__(struct __pyx_obj_5
  */
     case 3:
 
-    /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":280
+    /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":280
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     break;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":281
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":281
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   return __pyx_r;
 }
 
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":7
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":7
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":9
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":12
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":13
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":14
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":15
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":16
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":17
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+  int __pyx_clineno = 0;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":24
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":24
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":25
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":25
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     __pyx_t_1 = (__pyx_v_index < __pyx_t_2);
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-  __pyx_t_3 = (!__pyx_t_1);
+  __pyx_t_3 = ((!(__pyx_t_1 != 0)) != 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":26
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":26
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":27
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":27
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":28
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":28
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":31
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":31
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":32
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":32
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":33
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":33
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+    __pyx_t_4 = __Pyx_PyBytes_FromString(TD::Convert(__pyx_v_arc->label).c_str()); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 33; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":34
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":34
  *             arc = &arc_vector[i]
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  *             arcs.append((label, arc.cost, arc.dist2next))             # <<<<<<<<<<<<<<
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+    __pyx_t_9 = __Pyx_PyList_Append(__pyx_v_arcs, ((PyObject *)__pyx_t_8)); if (unlikely(__pyx_t_9 == -1)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 34; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":35
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":35
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   int __pyx_v_index;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":37
+/* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":37
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":38
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-  __pyx_t_3 = (!__pyx_t_1);
+  __pyx_t_3 = ((!(__pyx_t_1 != 0)) != 0);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":39
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":39
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  *             raise IndexError('lattice index out of range')             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":41
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":41
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":42
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":43
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":44
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":44
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":45
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":45
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":47
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":48
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":50
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":51
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+  __pyx_t_1 = __Pyx_PyBytes_FromString(HypergraphIO::AsPLF((__pyx_v_self->lattice[0]), 1).c_str()); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 51; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":53
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":54
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":56
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__(__pyx_ptype_5_cdec___pyx_scope_struct_18___iter__, __pyx_empty_tuple, NULL);
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   unsigned int __pyx_t_2;
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+  int __pyx_lineno = 0;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":58
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":59
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":64
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":64
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":65
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":65
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":66
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":66
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":67
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":67
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":68
+    /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":68
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-      /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":69
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":70
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":70
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":71
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":71
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":63
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":72
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-/* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":74
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":76
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":77
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":78
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":79
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":80
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":7
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-    __pyx_v_stats = ((struct __pyx_obj_5_cdec_SufficientStats *)__pyx_t_2);
-    __pyx_t_2 = 0;
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":8
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":8
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":9
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":9
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":10
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":10
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-  __Pyx_XDECREF(__pyx_t_2);
+  __Pyx_XDECREF(__pyx_t_3);
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@@ -14742,7 +15092,7 @@ static PyObject *__pyx_pw_5_cdec_9Candidate_5words_1__get__(PyObject *__pyx_v_se
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 }
 
-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":17
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":17
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":18
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":18
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":21
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":22
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":23
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":24
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":14
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":30
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":31
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":34
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":35
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":38
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":39
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":41
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":42
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":44
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":44
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":45
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":46
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":48
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":49
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":50
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":53
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":54
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":55
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":57
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":58
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":59
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":59
  *     def __add__(x, y):
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  *         cdef SufficientStats sy = as_stats(y, x)             # <<<<<<<<<<<<<<
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":60
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":60
  *         cdef SufficientStats sx = as_stats(x, y)
  *         cdef SufficientStats sy = as_stats(y, x)
  *         cdef SufficientStats result = SufficientStats()             # <<<<<<<<<<<<<<
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   __pyx_t_1 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":61
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":61
  *         cdef SufficientStats sy = as_stats(y, x)
  *         cdef SufficientStats result = SufficientStats()
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":62
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":62
  *         cdef SufficientStats result = SufficientStats()
  *         result.stats = new mteval.SufficientStats(mteval.add(sx.stats[0], sy.stats[0]))
  *         result.metric = sx.metric             # <<<<<<<<<<<<<<
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   __pyx_v_result->metric = __pyx_t_2;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":63
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":63
  *         result.stats = new mteval.SufficientStats(mteval.add(sx.stats[0], sy.stats[0]))
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  *         return result             # <<<<<<<<<<<<<<
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 static int __pyx_pw_5_cdec_12CandidateSet_1__cinit__(PyObject *__pyx_v_self, PyObject *__pyx_args, PyObject *__pyx_kwds) {
   struct __pyx_obj_5_cdec_SegmentEvaluator *__pyx_v_evaluator = 0;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":70
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  * 
  *     def __cinit__(self, SegmentEvaluator evaluator):             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":71
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":71
  * 
  *     def __cinit__(self, SegmentEvaluator evaluator):
  *         self.scorer = new shared_ptr[mteval.SegmentEvaluator](evaluator.scorer[0])             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":72
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":72
  *     def __cinit__(self, SegmentEvaluator evaluator):
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   __pyx_v_self->metric = __pyx_t_1;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":73
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":73
  *         self.scorer = new shared_ptr[mteval.SegmentEvaluator](evaluator.scorer[0])
  *         self.metric = evaluator.metric
  *         self.cs = new mteval.CandidateSet()             # <<<<<<<<<<<<<<
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":75
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  *     def __dealloc__(self):             # <<<<<<<<<<<<<<
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":76
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":77
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":77
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":79
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":79
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":80
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 static PyObject *__pyx_pw_5_cdec_12CandidateSet_7__getitem__(PyObject *__pyx_v_self, PyObject *__pyx_arg_k) {
   int __pyx_v_k;
+  int __pyx_lineno = 0;
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":82
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":82
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":83
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-  __pyx_t_2 = (!__pyx_t_1);
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":84
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":84
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":85
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":85
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":86
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":86
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":87
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":88
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":88
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":90
+/* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":90
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+  __pyx_cur_scope = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)__pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__(__pyx_ptype_5_cdec___pyx_scope_struct_22___iter__, __pyx_empty_tuple, NULL);
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":92
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":92
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":93
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":93
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":95
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":98
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":104
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":105
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":107
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":110
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":111
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":112
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":141
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":142
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":144
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":145
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":145
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-  __pyx_v_evaluator->metric = __pyx_t_10;
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":146
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":146
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":148
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":148
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":149
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":149
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":151
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":152
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":154
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":155
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":156
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":156
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":158
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":158
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":159
+    /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":159
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":160
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":160
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-/* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":162
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":166
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":167
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":169
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":169
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-    /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":170
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":171
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":172
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+              __pyx_t_2 = PySequence_ITEM(__pyx_t_4, __pyx_t_8); __pyx_t_8++; if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 91; __pyx_clineno = __LINE__; goto __pyx_L7_error;}
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-            /* "_cdec.pyx":93
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-            /* "_cdec.pyx":94
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@@ -19130,7 +19523,7 @@ static PyObject *__pyx_pf_5_cdec_7Decoder_4read_weights(struct __pyx_obj_5_cdec_
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-                {__pyx_filename = __pyx_f[0]; __pyx_lineno = 94; __pyx_clineno = __LINE__; goto __pyx_L7_error;}
+                {__pyx_filename = __pyx_f[0]; __pyx_lineno = 93; __pyx_clineno = __LINE__; goto __pyx_L7_error;}
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-              {__pyx_filename = __pyx_f[0]; __pyx_lineno = 94; __pyx_clineno = __LINE__; goto __pyx_L7_error;}
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+      __pyx_t_5 = __pyx_convert_string_from_py_(__pyx_t_4); if (unlikely(PyErr_Occurred())) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 108; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
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     /*else*/ {
 
-      /* "_cdec.pyx":111
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-      __pyx_t_3 = PyTuple_New(1); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 111; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      __Pyx_GOTREF(__pyx_t_3);
+      __pyx_t_4 = PyTuple_New(1); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 110; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __Pyx_GOTREF(__pyx_t_4);
       __Pyx_INCREF(__pyx_v_grammar);
-      PyTuple_SET_ITEM(__pyx_t_3, 0, __pyx_v_grammar);
+      PyTuple_SET_ITEM(__pyx_t_4, 0, __pyx_v_grammar);
       __Pyx_GIVEREF(__pyx_v_grammar);
-      __pyx_t_2 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_TextGrammar)), ((PyObject *)__pyx_t_3), NULL); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 111; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-      __Pyx_GOTREF(__pyx_t_2);
-      __Pyx_DECREF(((PyObject *)__pyx_t_3)); __pyx_t_3 = 0;
-      __pyx_v_self->dec->AddSupplementalGrammar((((struct __pyx_obj_5_cdec_TextGrammar *)__pyx_t_2)->__pyx_base.grammar[0]));
-      __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
+      __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_TextGrammar)), ((PyObject *)__pyx_t_4), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 110; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      __Pyx_GOTREF(__pyx_t_3);
+      __Pyx_DECREF(((PyObject *)__pyx_t_4)); __pyx_t_4 = 0;
+      __pyx_v_self->dec->AddSupplementalGrammar((((struct __pyx_obj_5_cdec_TextGrammar *)__pyx_t_3)->__pyx_base.grammar[0]));
+      __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
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     __pyx_L5:;
     goto __pyx_L4;
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   __pyx_L4:;
 
-  /* "_cdec.pyx":112
+  /* "_cdec.pyx":111
  *             else:
  *                 self.dec.AddSupplementalGrammar(TextGrammar(grammar).grammar[0])
  *         cdef decoder.BasicObserver observer = decoder.BasicObserver()             # <<<<<<<<<<<<<<
@@ -19547,58 +19947,58 @@ static PyObject *__pyx_pf_5_cdec_7Decoder_6translate(struct __pyx_obj_5_cdec_Dec
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-  /* "_cdec.pyx":113
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-  __pyx_v_self->dec->Decode(__pyx_t_4, (&__pyx_v_observer));
+  __pyx_t_5 = __pyx_convert_string_from_py_(((PyObject *)__pyx_v_input_str)); if (unlikely(PyErr_Occurred())) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 112; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_v_self->dec->Decode(__pyx_t_5, (&__pyx_v_observer));
 
-  /* "_cdec.pyx":114
+  /* "_cdec.pyx":113
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-  __pyx_t_1 = (__pyx_v_observer.hypergraph == NULL);
-  if (__pyx_t_1) {
+  __pyx_t_2 = ((__pyx_v_observer.hypergraph == NULL) != 0);
+  if (__pyx_t_2) {
 
-    /* "_cdec.pyx":115
+    /* "_cdec.pyx":114
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-    __pyx_t_2 = __Pyx_GetName(__pyx_m, __pyx_n_s__ParseFailed); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 115; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+    __pyx_t_3 = __Pyx_GetModuleGlobalName(__pyx_n_s__ParseFailed); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 114; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     __Pyx_GOTREF(__pyx_t_3);
-    __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
-    __Pyx_Raise(__pyx_t_3, 0, 0, 0);
+    __pyx_t_4 = PyObject_Call(__pyx_t_3, ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 114; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __Pyx_GOTREF(__pyx_t_4);
     __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
-    {__pyx_filename = __pyx_f[0]; __pyx_lineno = 115; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    __Pyx_Raise(__pyx_t_4, 0, 0, 0);
+    __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
+    {__pyx_filename = __pyx_f[0]; __pyx_lineno = 114; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     goto __pyx_L6;
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   __pyx_L6:;
 
-  /* "_cdec.pyx":116
+  /* "_cdec.pyx":115
  *         if observer.hypergraph == NULL:
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-  __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Hypergraph)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 116; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __Pyx_GOTREF(__pyx_t_3);
-  __pyx_v_hg = ((struct __pyx_obj_5_cdec_Hypergraph *)__pyx_t_3);
-  __pyx_t_3 = 0;
+  __pyx_t_4 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Hypergraph)), ((PyObject *)__pyx_empty_tuple), NULL); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 115; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __Pyx_GOTREF(__pyx_t_4);
+  __pyx_v_hg = ((struct __pyx_obj_5_cdec_Hypergraph *)__pyx_t_4);
+  __pyx_t_4 = 0;
 
-  /* "_cdec.pyx":117
+  /* "_cdec.pyx":116
  *             raise ParseFailed()
  *         cdef Hypergraph hg = Hypergraph()
  *         hg.hg = new hypergraph.Hypergraph(observer.hypergraph[0])             # <<<<<<<<<<<<<<
@@ -19606,7 +20006,7 @@ static PyObject *__pyx_pf_5_cdec_7Decoder_6translate(struct __pyx_obj_5_cdec_Dec
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-  /* "_cdec.pyx":118
+  /* "_cdec.pyx":117
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@@ -19619,8 +20019,8 @@ static PyObject *__pyx_pf_5_cdec_7Decoder_6translate(struct __pyx_obj_5_cdec_Dec
   __pyx_r = Py_None; __Pyx_INCREF(Py_None);
   goto __pyx_L0;
   __pyx_L1_error:;
-  __Pyx_XDECREF(__pyx_t_2);
   __Pyx_XDECREF(__pyx_t_3);
+  __Pyx_XDECREF(__pyx_t_4);
   __Pyx_AddTraceback("_cdec.Decoder.translate", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __pyx_r = NULL;
   __pyx_L0:;
@@ -19631,191 +20031,187 @@ static PyObject *__pyx_pf_5_cdec_7Decoder_6translate(struct __pyx_obj_5_cdec_Dec
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 }
 
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  * @cname("__pyx_convert_string_from_py_")
  * cdef string __pyx_convert_string_from_py_(object o) except *:             # <<<<<<<<<<<<<<
- *     return string(<char*>o, len(o))
- * 
+ *     cdef Py_ssize_t length
+ *     cdef char* data = __Pyx_PyObject_AsStringAndSize(o, &length)
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 static std::string __pyx_convert_string_from_py_(PyObject *__pyx_v_o) {
+  Py_ssize_t __pyx_v_length;
+  char *__pyx_v_data;
   std::string __pyx_r;
   __Pyx_RefNannyDeclarations
-  char *__pyx_t_1;
-  Py_ssize_t __pyx_t_2;
-  int __pyx_lineno = 0;
-  const char *__pyx_filename = NULL;
-  int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("__pyx_convert_string_from_py_", 0);
 
-  /* "string.from_py":13
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+  /* "string.from_py":15
  * cdef string __pyx_convert_string_from_py_(object o) except *:
- *     return string(<char*>o, len(o))             # <<<<<<<<<<<<<<
+ *     cdef Py_ssize_t length
+ *     cdef char* data = __Pyx_PyObject_AsStringAndSize(o, &length)             # <<<<<<<<<<<<<<
+ *     return string(data, length)
+ * 
+ */
+  __pyx_v_data = __Pyx_PyObject_AsStringAndSize(__pyx_v_o, (&__pyx_v_length));
+
+  /* "string.from_py":16
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+ *     cdef char* data = __Pyx_PyObject_AsStringAndSize(o, &length)
+ *     return string(data, length)             # <<<<<<<<<<<<<<
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  * 
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-  __pyx_t_1 = PyBytes_AsString(__pyx_v_o); if (unlikely((!__pyx_t_1) && PyErr_Occurred())) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 13; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_t_2 = PyObject_Length(__pyx_v_o); if (unlikely(__pyx_t_2 == -1)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 13; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_r = std::string(((char *)__pyx_t_1), __pyx_t_2);
+  __pyx_r = std::string(__pyx_v_data, __pyx_v_length);
   goto __pyx_L0;
 
-  goto __pyx_L0;
-  __pyx_L1_error:;
-  __Pyx_AddTraceback("string.from_py.__pyx_convert_string_from_py_", __pyx_clineno, __pyx_lineno, __pyx_filename);
   __pyx_L0:;
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 }
 
-static PyObject *__pyx_tp_new_5_cdec_DenseVector(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static PyObject *__pyx_tp_new_5_cdec_Scorer(PyTypeObject *t, PyObject *a, PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  if (unlikely(__pyx_pw_5_cdec_6Scorer_1__cinit__(o, a, k) < 0)) {
+    Py_DECREF(o); o = 0;
+  }
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_DenseVector(PyObject *o) {
+static void __pyx_tp_dealloc_5_cdec_Scorer(PyObject *o) {
   {
     PyObject *etype, *eval, *etb;
     PyErr_Fetch(&etype, &eval, &etb);
     ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_11DenseVector_3__dealloc__(o);
+    __pyx_pw_5_cdec_6Scorer_3__dealloc__(o);
     if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
     --Py_REFCNT(o);
     PyErr_Restore(etype, eval, etb);
   }
   (*Py_TYPE(o)->tp_free)(o);
 }
-static PyObject *__pyx_sq_item_5_cdec_DenseVector(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
-}
 
-static int __pyx_mp_ass_subscript_5_cdec_DenseVector(PyObject *o, PyObject *i, PyObject *v) {
-  if (v) {
-    return __pyx_pw_5_cdec_11DenseVector_9__setitem__(o, i, v);
-  }
-  else {
-    PyErr_Format(PyExc_NotImplementedError,
-      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
-    return -1;
-  }
-}
-
-static PyMethodDef __pyx_methods_5_cdec_DenseVector[] = {
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-  {__Pyx_NAMESTR("tosparse"), (PyCFunction)__pyx_pw_5_cdec_11DenseVector_16tosparse, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_11DenseVector_15tosparse)},
+static PyMethodDef __pyx_methods_5_cdec_Scorer[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number_DenseVector = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
+static PyTypeObject __pyx_type_5_cdec_Scorer = {
+  PyVarObject_HEAD_INIT(0, 0)
+  __Pyx_NAMESTR("_cdec.Scorer"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Scorer), /*tp_basicsize*/
+  0, /*tp_itemsize*/
+  __pyx_tp_dealloc_5_cdec_Scorer, /*tp_dealloc*/
+  0, /*tp_print*/
+  0, /*tp_getattr*/
+  0, /*tp_setattr*/
   #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
+  0, /*tp_compare*/
   #else
   0, /*reserved*/
   #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
+  0, /*tp_repr*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
+  0, /*tp_hash*/
+  __pyx_pw_5_cdec_6Scorer_5__call__, /*tp_call*/
+  __pyx_pw_5_cdec_6Scorer_7__str__, /*tp_str*/
+  0, /*tp_getattro*/
+  0, /*tp_setattro*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_doc*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
+  0, /*tp_richcompare*/
+  0, /*tp_weaklistoffset*/
+  0, /*tp_iter*/
+  0, /*tp_iternext*/
+  __pyx_methods_5_cdec_Scorer, /*tp_methods*/
+  0, /*tp_members*/
+  0, /*tp_getset*/
+  0, /*tp_base*/
+  0, /*tp_dict*/
+  0, /*tp_descr_get*/
+  0, /*tp_descr_set*/
+  0, /*tp_dictoffset*/
+  0, /*tp_init*/
+  0, /*tp_alloc*/
+  __pyx_tp_new_5_cdec_Scorer, /*tp_new*/
+  0, /*tp_free*/
+  0, /*tp_is_gc*/
+  0, /*tp_bases*/
+  0, /*tp_mro*/
+  0, /*tp_cache*/
+  0, /*tp_subclasses*/
+  0, /*tp_weaklist*/
+  0, /*tp_del*/
+  #if PY_VERSION_HEX >= 0x02060000
+  0, /*tp_version_tag*/
   #endif
 };
 
-static PySequenceMethods __pyx_tp_as_sequence_DenseVector = {
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-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_5_cdec_DenseVector, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *__pyx_freelist_5_cdec___pyx_scope_struct_24___init__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_24___init__ = 0;
 
-static PyMappingMethods __pyx_tp_as_mapping_DenseVector = {
-  __pyx_pw_5_cdec_11DenseVector_5__len__, /*mp_length*/
-  __pyx_pw_5_cdec_11DenseVector_7__getitem__, /*mp_subscript*/
-  __pyx_mp_ass_subscript_5_cdec_DenseVector, /*mp_ass_subscript*/
-};
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_24___init__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_24___init__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_24___init__[--__pyx_freecount_5_cdec___pyx_scope_struct_24___init__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o);
+  p->__pyx_v_config = 0;
+  return o;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_DenseVector = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_24___init__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_config);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_24___init__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_24___init__[__pyx_freecount_5_cdec___pyx_scope_struct_24___init__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
+}
+
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_24___init__(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
+  if (p->__pyx_v_config) {
+    e = (*v)(p->__pyx_v_config, a); if (e) return e;
+  }
+  return 0;
+}
+
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_24___init__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_config);
+  p->__pyx_v_config = ((PyObject*)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
+
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_24___init__[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_DenseVector = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_24___init__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.DenseVector"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_DenseVector), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_24___init__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_DenseVector, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_24___init__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -19825,24 +20221,24 @@ static PyTypeObject __pyx_type_5_cdec_DenseVector = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_DenseVector, /*tp_as_number*/
-  &__pyx_tp_as_sequence_DenseVector, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_DenseVector, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_DenseVector, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_24___init__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_24___init__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_11DenseVector_11__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_DenseVector, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_24___init__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -19850,9 +20246,9 @@ static PyTypeObject __pyx_type_5_cdec_DenseVector = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_11DenseVector_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_DenseVector, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_24___init__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -19866,153 +20262,46 @@ static PyTypeObject __pyx_type_5_cdec_DenseVector = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_SparseVector(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static PyObject *__pyx_tp_new_5_cdec_NTRef(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_SparseVector(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_12SparseVector_3__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
-  }
+static void __pyx_tp_dealloc_5_cdec_NTRef(PyObject *o) {
   (*Py_TYPE(o)->tp_free)(o);
 }
-static PyObject *__pyx_sq_item_5_cdec_SparseVector(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
+
+static PyObject *__pyx_getprop_5_cdec_5NTRef_ref(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5NTRef_3ref_1__get__(o);
 }
 
-static int __pyx_mp_ass_subscript_5_cdec_SparseVector(PyObject *o, PyObject *i, PyObject *v) {
+static int __pyx_setprop_5_cdec_5NTRef_ref(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
   if (v) {
-    return __pyx_pw_5_cdec_12SparseVector_9__setitem__(o, i, v);
+    return __pyx_pw_5_cdec_5NTRef_3ref_3__set__(o, v);
   }
   else {
-    PyErr_Format(PyExc_NotImplementedError,
-      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
     return -1;
   }
 }
 
-static PyMethodDef __pyx_methods_5_cdec_SparseVector[] = {
-  {__Pyx_NAMESTR("copy"), (PyCFunction)__pyx_pw_5_cdec_12SparseVector_5copy, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_12SparseVector_4copy)},
-  {__Pyx_NAMESTR("dot"), (PyCFunction)__pyx_pw_5_cdec_12SparseVector_14dot, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_12SparseVector_13dot)},
+static PyMethodDef __pyx_methods_5_cdec_NTRef[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number_SparseVector = {
-  __pyx_pw_5_cdec_12SparseVector_32__add__, /*nb_add*/
-  __pyx_pw_5_cdec_12SparseVector_34__sub__, /*nb_subtract*/
-  __pyx_pw_5_cdec_12SparseVector_36__mul__, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  __pyx_pw_5_cdec_12SparseVector_38__div__, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  __pyx_pw_5_cdec_12SparseVector_22__neg__, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  __pyx_pw_5_cdec_12SparseVector_24__iadd__, /*nb_inplace_add*/
-  __pyx_pw_5_cdec_12SparseVector_26__isub__, /*nb_inplace_subtract*/
-  __pyx_pw_5_cdec_12SparseVector_28__imul__, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  __pyx_pw_5_cdec_12SparseVector_30__idiv__, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_SparseVector = {
-  __pyx_pw_5_cdec_12SparseVector_18__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_5_cdec_SparseVector, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  __pyx_pw_5_cdec_12SparseVector_20__contains__, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_SparseVector = {
-  __pyx_pw_5_cdec_12SparseVector_18__len__, /*mp_length*/
-  __pyx_pw_5_cdec_12SparseVector_7__getitem__, /*mp_subscript*/
-  __pyx_mp_ass_subscript_5_cdec_SparseVector, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_SparseVector = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_NTRef[] = {
+  {(char *)"ref", __pyx_getprop_5_cdec_5NTRef_ref, __pyx_setprop_5_cdec_5NTRef_ref, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_SparseVector = {
+static PyTypeObject __pyx_type_5_cdec_NTRef = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.SparseVector"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_SparseVector), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.NTRef"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_NTRef), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_SparseVector, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_NTRef, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -20022,34 +20311,34 @@ static PyTypeObject __pyx_type_5_cdec_SparseVector = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_SparseVector, /*tp_as_number*/
-  &__pyx_tp_as_sequence_SparseVector, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_SparseVector, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  0, /*tp_str*/
+  __pyx_pw_5_cdec_5NTRef_3__str__, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_SparseVector, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
-  __pyx_pw_5_cdec_12SparseVector_16__richcmp__, /*tp_richcompare*/
+  0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_12SparseVector_11__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_SparseVector, /*tp_methods*/
+  __pyx_methods_5_cdec_NTRef, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_NTRef, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_12SparseVector_1__init__, /*tp_init*/
+  __pyx_pw_5_cdec_5NTRef_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_SparseVector, /*tp_new*/
+  __pyx_tp_new_5_cdec_NTRef, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -20063,182 +20352,65 @@ static PyTypeObject __pyx_type_5_cdec_SparseVector = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_NT(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_NT *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_NT *)o);
-  p->cat = ((PyObject*)Py_None); Py_INCREF(Py_None);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *__pyx_freelist_5_cdec___pyx_scope_struct_22___iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_22___iter__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_22___iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_22___iter__[--__pyx_freecount_5_cdec___pyx_scope_struct_22___iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_NT(PyObject *o) {
-  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_22___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->cat);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_22___iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_22___iter__[__pyx_freecount_5_cdec___pyx_scope_struct_22___iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec_NT(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_22___iter__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
-  if (p->cat) {
-    e = (*v)(p->cat, a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec_NT(PyObject *o) {
-  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_22___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->cat);
-  p->cat = ((PyObject*)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_CandidateSet *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyObject *__pyx_getprop_5_cdec_2NT_cat(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_2NT_3cat_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_2NT_cat(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_2NT_3cat_3__set__(o, v);
-  }
-  else {
-    return __pyx_pw_5_cdec_2NT_3cat_5__del__(o);
-  }
-}
-
-static PyObject *__pyx_getprop_5_cdec_2NT_ref(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_2NT_3ref_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_2NT_ref(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_2NT_3ref_3__set__(o, v);
-  }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
-  }
-}
-
-static PyMethodDef __pyx_methods_5_cdec_NT[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_22___iter__[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_NT[] = {
-  {(char *)"cat", __pyx_getprop_5_cdec_2NT_cat, __pyx_setprop_5_cdec_2NT_cat, 0, 0},
-  {(char *)"ref", __pyx_getprop_5_cdec_2NT_ref, __pyx_setprop_5_cdec_2NT_ref, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_NT = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_NT = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_NT = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_NT = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_NT = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_22___iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.NT"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_NT), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_22___iter__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_NT, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_22___iter__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -20248,34 +20420,34 @@ static PyTypeObject __pyx_type_5_cdec_NT = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_NT, /*tp_as_number*/
-  &__pyx_tp_as_sequence_NT, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_NT, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  __pyx_pw_5_cdec_2NT_3__str__, /*tp_str*/
+  0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_NT, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec_NT, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec_NT, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_22___iter__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_22___iter__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_NT, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_22___iter__, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_NT, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_2NT_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_NT, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -20289,23 +20461,33 @@ static PyTypeObject __pyx_type_5_cdec_NT = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_NTRef(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static PyObject *__pyx_tp_new_5_cdec_Grammar(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_NTRef(PyObject *o) {
+static void __pyx_tp_dealloc_5_cdec_Grammar(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_7Grammar_1__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static PyObject *__pyx_getprop_5_cdec_5NTRef_ref(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5NTRef_3ref_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_7Grammar_name(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_7Grammar_4name_1__get__(o);
 }
 
-static int __pyx_setprop_5_cdec_5NTRef_ref(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+static int __pyx_setprop_5_cdec_7Grammar_name(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
   if (v) {
-    return __pyx_pw_5_cdec_5NTRef_3ref_3__set__(o, v);
+    return __pyx_pw_5_cdec_7Grammar_4name_3__set__(o, v);
   }
   else {
     PyErr_SetString(PyExc_NotImplementedError, "__del__");
@@ -20313,119 +20495,21 @@ static int __pyx_setprop_5_cdec_5NTRef_ref(PyObject *o, PyObject *v, CYTHON_UNUS
   }
 }
 
-static PyMethodDef __pyx_methods_5_cdec_NTRef[] = {
+static PyMethodDef __pyx_methods_5_cdec_Grammar[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_NTRef[] = {
-  {(char *)"ref", __pyx_getprop_5_cdec_5NTRef_ref, __pyx_setprop_5_cdec_5NTRef_ref, 0, 0},
+static struct PyGetSetDef __pyx_getsets_5_cdec_Grammar[] = {
+  {(char *)"name", __pyx_getprop_5_cdec_7Grammar_name, __pyx_setprop_5_cdec_7Grammar_name, 0, 0},
   {0, 0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number_NTRef = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_NTRef = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_NTRef = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_NTRef = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_NTRef = {
+static PyTypeObject __pyx_type_5_cdec_Grammar = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.NTRef"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_NTRef), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Grammar"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Grammar), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_NTRef, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Grammar, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -20435,34 +20519,34 @@ static PyTypeObject __pyx_type_5_cdec_NTRef = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_NTRef, /*tp_as_number*/
-  &__pyx_tp_as_sequence_NTRef, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_NTRef, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  __pyx_pw_5_cdec_5NTRef_3__str__, /*tp_str*/
+  0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_NTRef, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_7Grammar_3__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_NTRef, /*tp_methods*/
+  __pyx_methods_5_cdec_Grammar, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_NTRef, /*tp_getset*/
+  __pyx_getsets_5_cdec_Grammar, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_5NTRef_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_NTRef, /*tp_new*/
+  __pyx_tp_new_5_cdec_Grammar, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -20476,217 +20560,113 @@ static PyTypeObject __pyx_type_5_cdec_NTRef = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_TRule(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  return o;
-}
+static struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *__pyx_freelist_5_cdec___pyx_scope_struct_20_lines[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_20_lines = 0;
 
-static void __pyx_tp_dealloc_5_cdec_TRule(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_5TRule_3__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_20_lines(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_20_lines > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_20_lines[--__pyx_freecount_5_cdec___pyx_scope_struct_20_lines];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
   }
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_5TRule_arity(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_5arity_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_5TRule_f(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_1f_1__get__(o);
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o);
+  p->__pyx_outer_scope = 0;
+  p->__pyx_v_delta = 0;
+  p->__pyx_v_i = 0;
+  p->__pyx_v_label = 0;
+  p->__pyx_v_weight = 0;
+  p->__pyx_t_1 = 0;
+  p->__pyx_t_3 = 0;
+  return o;
 }
 
-static int __pyx_setprop_5_cdec_5TRule_f(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_5TRule_1f_3__set__(o, v);
-  }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_20_lines(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_outer_scope);
+  Py_CLEAR(p->__pyx_v_delta);
+  Py_CLEAR(p->__pyx_v_i);
+  Py_CLEAR(p->__pyx_v_label);
+  Py_CLEAR(p->__pyx_v_weight);
+  Py_CLEAR(p->__pyx_t_1);
+  Py_CLEAR(p->__pyx_t_3);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_20_lines < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_20_lines[__pyx_freecount_5_cdec___pyx_scope_struct_20_lines++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
   }
 }
 
-static PyObject *__pyx_getprop_5_cdec_5TRule_e(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_1e_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_5TRule_e(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_5TRule_1e_3__set__(o, v);
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_20_lines(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
+  if (p->__pyx_outer_scope) {
+    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
   }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
+  if (p->__pyx_v_delta) {
+    e = (*v)(p->__pyx_v_delta, a); if (e) return e;
   }
-}
-
-static PyObject *__pyx_getprop_5_cdec_5TRule_a(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_1a_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_5TRule_a(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_5TRule_1a_4__set__(o, v);
+  if (p->__pyx_v_i) {
+    e = (*v)(p->__pyx_v_i, a); if (e) return e;
   }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
+  if (p->__pyx_v_label) {
+    e = (*v)(p->__pyx_v_label, a); if (e) return e;
   }
-}
-
-static PyObject *__pyx_getprop_5_cdec_5TRule_scores(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_6scores_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_5TRule_scores(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_5TRule_6scores_3__set__(o, v);
+  if (p->__pyx_v_weight) {
+    e = (*v)(p->__pyx_v_weight, a); if (e) return e;
   }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
+  if (p->__pyx_t_1) {
+    e = (*v)(p->__pyx_t_1, a); if (e) return e;
   }
+  if (p->__pyx_t_3) {
+    e = (*v)(p->__pyx_t_3, a); if (e) return e;
+  }
+  return 0;
 }
 
-static PyObject *__pyx_getprop_5_cdec_5TRule_lhs(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_5TRule_3lhs_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_5TRule_lhs(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_5TRule_3lhs_3__set__(o, v);
-  }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
-  }
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_20_lines(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_outer_scope);
+  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_delta);
+  p->__pyx_v_delta = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_i);
+  p->__pyx_v_i = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_label);
+  p->__pyx_v_label = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_weight);
+  p->__pyx_v_weight = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_t_1);
+  p->__pyx_t_1 = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_t_3);
+  p->__pyx_t_3 = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_TRule[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_20_lines[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_TRule[] = {
-  {(char *)"arity", __pyx_getprop_5_cdec_5TRule_arity, 0, 0, 0},
-  {(char *)"f", __pyx_getprop_5_cdec_5TRule_f, __pyx_setprop_5_cdec_5TRule_f, 0, 0},
-  {(char *)"e", __pyx_getprop_5_cdec_5TRule_e, __pyx_setprop_5_cdec_5TRule_e, 0, 0},
-  {(char *)"a", __pyx_getprop_5_cdec_5TRule_a, __pyx_setprop_5_cdec_5TRule_a, 0, 0},
-  {(char *)"scores", __pyx_getprop_5_cdec_5TRule_scores, __pyx_setprop_5_cdec_5TRule_scores, 0, 0},
-  {(char *)"lhs", __pyx_getprop_5_cdec_5TRule_lhs, __pyx_setprop_5_cdec_5TRule_lhs, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_TRule = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_TRule = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_TRule = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_TRule = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_TRule = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_20_lines = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.TRule"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_TRule), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_20_lines"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_TRule, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_20_lines, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -20696,34 +20676,34 @@ static PyTypeObject __pyx_type_5_cdec_TRule = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_TRule, /*tp_as_number*/
-  &__pyx_tp_as_sequence_TRule, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_TRule, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  __pyx_pw_5_cdec_5TRule_5__str__, /*tp_str*/
+  0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_TRule, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_20_lines, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_20_lines, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_TRule, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_20_lines, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_TRule, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_5TRule_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_TRule, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_20_lines, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -20737,120 +20717,65 @@ static PyTypeObject __pyx_type_5_cdec_TRule = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_MRule(PyTypeObject *t, PyObject *a, PyObject *k) {
-  PyObject *o = __pyx_tp_new_5_cdec_TRule(t, a, k);
-  if (!o) return 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *__pyx_freelist_5_cdec___pyx_scope_struct_12_sample_trees[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_12_sample_trees = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_12_sample_trees > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_12_sample_trees[--__pyx_freecount_5_cdec___pyx_scope_struct_12_sample_trees];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_MRule[] = {
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_MRule = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_12_sample_trees < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_12_sample_trees[__pyx_freecount_5_cdec___pyx_scope_struct_12_sample_trees++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
+}
 
-static PySequenceMethods __pyx_tp_as_sequence_MRule = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  }
+  return 0;
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_MRule = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_MRule = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_12_sample_trees[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_MRule = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_12_sample_trees = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.MRule"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_MRule), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_12_sample_trees"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_TRule, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -20860,28 +20785,24 @@ static PyTypeObject __pyx_type_5_cdec_MRule = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_MRule, /*tp_as_number*/
-  &__pyx_tp_as_sequence_MRule, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_MRule, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_5_cdec_5TRule_5__str__, /*tp_str*/
-  #else
   0, /*tp_str*/
-  #endif
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_MRule, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_MRule, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -20889,9 +20810,9 @@ static PyTypeObject __pyx_type_5_cdec_MRule = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_5MRule_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_MRule, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -20905,152 +20826,65 @@ static PyTypeObject __pyx_type_5_cdec_MRule = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Grammar(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_13___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_13___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_13___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_13___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_13___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_13___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Grammar(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_7Grammar_1__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_13___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_13___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_13___get__[__pyx_freecount_5_cdec___pyx_scope_struct_13___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
   }
-  (*Py_TYPE(o)->tp_free)(o);
 }
 
-static PyObject *__pyx_getprop_5_cdec_7Grammar_name(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_7Grammar_4name_1__get__(o);
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_13___get__(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  }
+  return 0;
 }
 
-static int __pyx_setprop_5_cdec_7Grammar_name(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_7Grammar_4name_3__set__(o, v);
-  }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
-  }
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_13___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Grammar[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_13___get__[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_Grammar[] = {
-  {(char *)"name", __pyx_getprop_5_cdec_7Grammar_name, __pyx_setprop_5_cdec_7Grammar_name, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_Grammar = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Grammar = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Grammar = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_Grammar = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_Grammar = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_13___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Grammar"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Grammar), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_13___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Grammar, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_13___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -21060,26 +20894,26 @@ static PyTypeObject __pyx_type_5_cdec_Grammar = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Grammar, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Grammar, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Grammar, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Grammar, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_13___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_13___get__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_7Grammar_3__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Grammar, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_13___get__, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_Grammar, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -21087,7 +20921,7 @@ static PyTypeObject __pyx_type_5_cdec_Grammar = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Grammar, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_13___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -21101,120 +20935,65 @@ static PyTypeObject __pyx_type_5_cdec_Grammar = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_TextGrammar(PyTypeObject *t, PyObject *a, PyObject *k) {
-  PyObject *o = __pyx_tp_new_5_cdec_Grammar(t, a, k);
-  if (!o) return 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *__pyx_freelist_5_cdec___pyx_scope_struct_2__phrase[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_2__phrase = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_2__phrase(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_2__phrase > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_2__phrase[--__pyx_freecount_5_cdec___pyx_scope_struct_2__phrase];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o);
+  p->__pyx_v_phrase = 0;
   return o;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_TextGrammar[] = {
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_TextGrammar = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_2__phrase(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_phrase);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_2__phrase < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_2__phrase[__pyx_freecount_5_cdec___pyx_scope_struct_2__phrase++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
+}
 
-static PySequenceMethods __pyx_tp_as_sequence_TextGrammar = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_2__phrase(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
+  if (p->__pyx_v_phrase) {
+    e = (*v)(p->__pyx_v_phrase, a); if (e) return e;
+  }
+  return 0;
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_TextGrammar = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_2__phrase(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_phrase);
+  p->__pyx_v_phrase = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_TextGrammar = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_2__phrase[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_TextGrammar = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_2__phrase = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.TextGrammar"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_TextGrammar), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_2__phrase"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Grammar, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_2__phrase, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -21224,28 +21003,24 @@ static PyTypeObject __pyx_type_5_cdec_TextGrammar = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_TextGrammar, /*tp_as_number*/
-  &__pyx_tp_as_sequence_TextGrammar, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_TextGrammar, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_TextGrammar, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_2__phrase, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_2__phrase, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_5_cdec_7Grammar_3__iter__, /*tp_iter*/
-  #else
   0, /*tp_iter*/
-  #endif
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_TextGrammar, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_2__phrase, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -21253,9 +21028,9 @@ static PyTypeObject __pyx_type_5_cdec_TextGrammar = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_11TextGrammar_1__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_TextGrammar, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_2__phrase, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -21268,137 +21043,47 @@ static PyTypeObject __pyx_type_5_cdec_TextGrammar = {
   0, /*tp_version_tag*/
   #endif
 };
-static struct __pyx_vtabstruct_5_cdec_Hypergraph __pyx_vtable_5_cdec_Hypergraph;
 
-static PyObject *__pyx_tp_new_5_cdec_Hypergraph(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_Hypergraph *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_Hypergraph *)o);
-  p->__pyx_vtab = __pyx_vtabptr_5_cdec_Hypergraph;
+static PyObject *__pyx_tp_new_5_cdec_CandidateSet(PyTypeObject *t, PyObject *a, PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  if (unlikely(__pyx_pw_5_cdec_12CandidateSet_1__cinit__(o, a, k) < 0)) {
+    Py_DECREF(o); o = 0;
+  }
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Hypergraph(PyObject *o) {
+static void __pyx_tp_dealloc_5_cdec_CandidateSet(PyObject *o) {
   {
     PyObject *etype, *eval, *etb;
     PyErr_Fetch(&etype, &eval, &etb);
     ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_10Hypergraph_1__dealloc__(o);
+    __pyx_pw_5_cdec_12CandidateSet_3__dealloc__(o);
     if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
     --Py_REFCNT(o);
     PyErr_Restore(etype, eval, etb);
   }
   (*Py_TYPE(o)->tp_free)(o);
 }
-
-static PyObject *__pyx_getprop_5_cdec_10Hypergraph_edges(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_10Hypergraph_5edges_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_10Hypergraph_nodes(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_10Hypergraph_5nodes_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_10Hypergraph_goal(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_10Hypergraph_4goal_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_10Hypergraph_npaths(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_10Hypergraph_6npaths_1__get__(o);
+static PyObject *__pyx_sq_item_5_cdec_CandidateSet(PyObject *o, Py_ssize_t i) {
+  PyObject *r;
+  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
+  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
+  Py_DECREF(x);
+  return r;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Hypergraph[] = {
-  {__Pyx_NAMESTR("viterbi"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_3viterbi, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_2viterbi)},
-  {__Pyx_NAMESTR("viterbi_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_5viterbi_trees, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_4viterbi_trees)},
-  {__Pyx_NAMESTR("viterbi_features"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_7viterbi_features, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_6viterbi_features)},
-  {__Pyx_NAMESTR("viterbi_forest"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_9viterbi_forest, METH_NOARGS, __Pyx_DOCSTR(0)},
-  {__Pyx_NAMESTR("viterbi_joshua"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_11viterbi_joshua, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_10viterbi_joshua)},
-  {__Pyx_NAMESTR("kbest"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_13kbest, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_12kbest)},
-  {__Pyx_NAMESTR("kbest_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_16kbest_trees, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_15kbest_trees)},
-  {__Pyx_NAMESTR("kbest_features"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_19kbest_features, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_18kbest_features)},
-  {__Pyx_NAMESTR("sample"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_22sample, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_21sample)},
-  {__Pyx_NAMESTR("sample_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_25sample_trees, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_24sample_trees)},
-  {__Pyx_NAMESTR("intersect"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_28intersect, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_27intersect)},
-  {__Pyx_NAMESTR("prune"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_30prune, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_29prune)},
-  {__Pyx_NAMESTR("lattice"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_32lattice, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_31lattice)},
-  {__Pyx_NAMESTR("plf"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_34plf, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_33plf)},
-  {__Pyx_NAMESTR("reweight"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_36reweight, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_35reweight)},
-  {__Pyx_NAMESTR("inside_outside"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_38inside_outside, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_37inside_outside)},
+static PyMethodDef __pyx_methods_5_cdec_CandidateSet[] = {
+  {__Pyx_NAMESTR("add_kbest"), (PyCFunction)__pyx_pw_5_cdec_12CandidateSet_12add_kbest, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_12CandidateSet_11add_kbest)},
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_Hypergraph[] = {
-  {(char *)"edges", __pyx_getprop_5_cdec_10Hypergraph_edges, 0, 0, 0},
-  {(char *)"nodes", __pyx_getprop_5_cdec_10Hypergraph_nodes, 0, 0, 0},
-  {(char *)"goal", __pyx_getprop_5_cdec_10Hypergraph_goal, 0, 0, 0},
-  {(char *)"npaths", __pyx_getprop_5_cdec_10Hypergraph_npaths, 0, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_Hypergraph = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Hypergraph = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_CandidateSet = {
+  __pyx_pw_5_cdec_12CandidateSet_5__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
-  0, /*sq_item*/
+  __pyx_sq_item_5_cdec_CandidateSet, /*sq_item*/
   0, /*sq_slice*/
   0, /*sq_ass_item*/
   0, /*sq_ass_slice*/
@@ -21407,39 +21092,18 @@ static PySequenceMethods __pyx_tp_as_sequence_Hypergraph = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping_Hypergraph = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
+static PyMappingMethods __pyx_tp_as_mapping_CandidateSet = {
+  __pyx_pw_5_cdec_12CandidateSet_5__len__, /*mp_length*/
+  __pyx_pw_5_cdec_12CandidateSet_7__getitem__, /*mp_subscript*/
   0, /*mp_ass_subscript*/
 };
 
-static PyBufferProcs __pyx_tp_as_buffer_Hypergraph = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_Hypergraph = {
+static PyTypeObject __pyx_type_5_cdec_CandidateSet = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Hypergraph"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Hypergraph), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.CandidateSet"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_CandidateSet), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Hypergraph, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_CandidateSet, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -21449,26 +21113,26 @@ static PyTypeObject __pyx_type_5_cdec_Hypergraph = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Hypergraph, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Hypergraph, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Hypergraph, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  &__pyx_tp_as_sequence_CandidateSet, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_CandidateSet, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Hypergraph, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_12CandidateSet_9__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Hypergraph, /*tp_methods*/
+  __pyx_methods_5_cdec_CandidateSet, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_Hypergraph, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -21476,7 +21140,7 @@ static PyTypeObject __pyx_type_5_cdec_Hypergraph = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Hypergraph, /*tp_new*/
+  __pyx_tp_new_5_cdec_CandidateSet, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -21489,200 +21153,66 @@ static PyTypeObject __pyx_type_5_cdec_Hypergraph = {
   0, /*tp_version_tag*/
   #endif
 };
-static struct __pyx_vtabstruct_5_cdec_HypergraphEdge __pyx_vtable_5_cdec_HypergraphEdge;
 
-static PyObject *__pyx_tp_new_5_cdec_HypergraphEdge(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_HypergraphEdge *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_HypergraphEdge *)o);
-  p->__pyx_vtab = __pyx_vtabptr_5_cdec_HypergraphEdge;
-  p->trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_14___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_14___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_14___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_14___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_14___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_14___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_HypergraphEdge(PyObject *o) {
-  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_14___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->trule);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_14___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_14___get__[__pyx_freecount_5_cdec___pyx_scope_struct_14___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec_HypergraphEdge(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_14___get__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
-  if (p->trule) {
-    e = (*v)(((PyObject*)p->trule), a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec_HypergraphEdge(PyObject *o) {
-  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_14___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->trule);
-  p->trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_head_node(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_9head_node_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_tail_nodes(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_10tail_nodes_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_span(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_4span_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_src_span(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_8src_span_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_feature_values(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_14feature_values_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_prob(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_4prob_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_trule(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphEdge_5trule_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_14HypergraphEdge_trule(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_14HypergraphEdge_5trule_3__set__(o, v);
-  }
-  else {
-    return __pyx_pw_5_cdec_14HypergraphEdge_5trule_5__del__(o);
-  }
-}
-
-static PyMethodDef __pyx_methods_5_cdec_HypergraphEdge[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_14___get__[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_HypergraphEdge[] = {
-  {(char *)"head_node", __pyx_getprop_5_cdec_14HypergraphEdge_head_node, 0, 0, 0},
-  {(char *)"tail_nodes", __pyx_getprop_5_cdec_14HypergraphEdge_tail_nodes, 0, 0, 0},
-  {(char *)"span", __pyx_getprop_5_cdec_14HypergraphEdge_span, 0, 0, 0},
-  {(char *)"src_span", __pyx_getprop_5_cdec_14HypergraphEdge_src_span, 0, 0, 0},
-  {(char *)"feature_values", __pyx_getprop_5_cdec_14HypergraphEdge_feature_values, 0, 0, 0},
-  {(char *)"prob", __pyx_getprop_5_cdec_14HypergraphEdge_prob, 0, 0, 0},
-  {(char *)"trule", __pyx_getprop_5_cdec_14HypergraphEdge_trule, __pyx_setprop_5_cdec_14HypergraphEdge_trule, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_HypergraphEdge = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_HypergraphEdge = {
-  __pyx_pw_5_cdec_14HypergraphEdge_1__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_HypergraphEdge = {
-  __pyx_pw_5_cdec_14HypergraphEdge_1__len__, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_HypergraphEdge = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_HypergraphEdge = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_14___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.HypergraphEdge"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_HypergraphEdge), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_14___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_HypergraphEdge, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_14___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -21692,26 +21222,26 @@ static PyTypeObject __pyx_type_5_cdec_HypergraphEdge = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_HypergraphEdge, /*tp_as_number*/
-  &__pyx_tp_as_sequence_HypergraphEdge, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_HypergraphEdge, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_HypergraphEdge, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec_HypergraphEdge, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec_HypergraphEdge, /*tp_clear*/
-  __pyx_pw_5_cdec_14HypergraphEdge_3__richcmp__, /*tp_richcompare*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_14___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_14___get__, /*tp_clear*/
+  0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_HypergraphEdge, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_14___get__, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_HypergraphEdge, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -21719,7 +21249,7 @@ static PyTypeObject __pyx_type_5_cdec_HypergraphEdge = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_HypergraphEdge, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_14___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -21732,153 +21262,121 @@ static PyTypeObject __pyx_type_5_cdec_HypergraphEdge = {
   0, /*tp_version_tag*/
   #endif
 };
-static struct __pyx_vtabstruct_5_cdec_HypergraphNode __pyx_vtable_5_cdec_HypergraphNode;
 
-static PyObject *__pyx_tp_new_5_cdec_HypergraphNode(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_HypergraphNode *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_HypergraphNode *)o);
-  p->__pyx_vtab = __pyx_vtabptr_5_cdec_HypergraphNode;
+static PyObject *__pyx_tp_new_5_cdec_TRule(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_HypergraphNode(PyObject *o) {
+static void __pyx_tp_dealloc_5_cdec_TRule(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_5TRule_3__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_in_edges(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphNode_8in_edges_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_5TRule_arity(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_5arity_1__get__(o);
 }
 
-static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_out_edges(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphNode_9out_edges_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_5TRule_f(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_1f_1__get__(o);
 }
 
-static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_span(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphNode_4span_1__get__(o);
+static int __pyx_setprop_5_cdec_5TRule_f(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_5TRule_1f_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
 }
 
-static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_cat(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_14HypergraphNode_3cat_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_5TRule_e(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_1e_1__get__(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec_HypergraphNode[] = {
-  {0, 0, 0, 0}
-};
+static int __pyx_setprop_5_cdec_5TRule_e(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_5TRule_1e_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_HypergraphNode[] = {
-  {(char *)"in_edges", __pyx_getprop_5_cdec_14HypergraphNode_in_edges, 0, 0, 0},
-  {(char *)"out_edges", __pyx_getprop_5_cdec_14HypergraphNode_out_edges, 0, 0, 0},
-  {(char *)"span", __pyx_getprop_5_cdec_14HypergraphNode_span, 0, 0, 0},
-  {(char *)"cat", __pyx_getprop_5_cdec_14HypergraphNode_cat, 0, 0, 0},
-  {0, 0, 0, 0, 0}
-};
+static PyObject *__pyx_getprop_5_cdec_5TRule_a(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_1a_1__get__(o);
+}
 
-static PyNumberMethods __pyx_tp_as_number_HypergraphNode = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static int __pyx_setprop_5_cdec_5TRule_a(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_5TRule_1a_4__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
 
-static PySequenceMethods __pyx_tp_as_sequence_HypergraphNode = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static PyObject *__pyx_getprop_5_cdec_5TRule_scores(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_6scores_1__get__(o);
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_HypergraphNode = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
+static int __pyx_setprop_5_cdec_5TRule_scores(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_5TRule_6scores_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
+
+static PyObject *__pyx_getprop_5_cdec_5TRule_lhs(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_5TRule_3lhs_1__get__(o);
+}
+
+static int __pyx_setprop_5_cdec_5TRule_lhs(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_5TRule_3lhs_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
+
+static PyMethodDef __pyx_methods_5_cdec_TRule[] = {
+  {0, 0, 0, 0}
 };
 
-static PyBufferProcs __pyx_tp_as_buffer_HypergraphNode = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_TRule[] = {
+  {(char *)"arity", __pyx_getprop_5_cdec_5TRule_arity, 0, 0, 0},
+  {(char *)"f", __pyx_getprop_5_cdec_5TRule_f, __pyx_setprop_5_cdec_5TRule_f, 0, 0},
+  {(char *)"e", __pyx_getprop_5_cdec_5TRule_e, __pyx_setprop_5_cdec_5TRule_e, 0, 0},
+  {(char *)"a", __pyx_getprop_5_cdec_5TRule_a, __pyx_setprop_5_cdec_5TRule_a, 0, 0},
+  {(char *)"scores", __pyx_getprop_5_cdec_5TRule_scores, __pyx_setprop_5_cdec_5TRule_scores, 0, 0},
+  {(char *)"lhs", __pyx_getprop_5_cdec_5TRule_lhs, __pyx_setprop_5_cdec_5TRule_lhs, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_HypergraphNode = {
+static PyTypeObject __pyx_type_5_cdec_TRule = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.HypergraphNode"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_HypergraphNode), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.TRule"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_TRule), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_HypergraphNode, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_TRule, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -21888,34 +21386,34 @@ static PyTypeObject __pyx_type_5_cdec_HypergraphNode = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_HypergraphNode, /*tp_as_number*/
-  &__pyx_tp_as_sequence_HypergraphNode, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_HypergraphNode, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  0, /*tp_str*/
+  __pyx_pw_5_cdec_5TRule_5__str__, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_HypergraphNode, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
-  __pyx_pw_5_cdec_14HypergraphNode_1__richcmp__, /*tp_richcompare*/
+  0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_HypergraphNode, /*tp_methods*/
+  __pyx_methods_5_cdec_TRule, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_HypergraphNode, /*tp_getset*/
+  __pyx_getsets_5_cdec_TRule, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_5TRule_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_HypergraphNode, /*tp_new*/
+  __pyx_tp_new_5_cdec_TRule, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -21929,157 +21427,81 @@ static PyTypeObject __pyx_type_5_cdec_HypergraphNode = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Lattice(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  if (__pyx_pw_5_cdec_7Lattice_1__cinit__(o, __pyx_empty_tuple, NULL) < 0) {
-    Py_DECREF(o); o = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *__pyx_freelist_5_cdec___pyx_scope_struct_3_genexpr[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_3_genexpr = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_3_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_3_genexpr > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_3_genexpr[--__pyx_freecount_5_cdec___pyx_scope_struct_3_genexpr];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
   }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o);
+  p->__pyx_outer_scope = 0;
+  p->__pyx_v_w = 0;
+  p->__pyx_t_0 = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Lattice(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_7Lattice_5__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_outer_scope);
+  Py_CLEAR(p->__pyx_v_w);
+  Py_CLEAR(p->__pyx_t_0);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_3_genexpr < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_3_genexpr[__pyx_freecount_5_cdec___pyx_scope_struct_3_genexpr++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
   }
-  (*Py_TYPE(o)->tp_free)(o);
-}
-static PyObject *__pyx_sq_item_5_cdec_Lattice(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
 }
 
-static int __pyx_mp_ass_subscript_5_cdec_Lattice(PyObject *o, PyObject *i, PyObject *v) {
-  if (v) {
-    return __pyx_pw_5_cdec_7Lattice_9__setitem__(o, i, v);
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
+  if (p->__pyx_outer_scope) {
+    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
   }
-  else {
-    PyErr_Format(PyExc_NotImplementedError,
-      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
-    return -1;
+  if (p->__pyx_v_w) {
+    e = (*v)(p->__pyx_v_w, a); if (e) return e;
   }
+  if (p->__pyx_t_0) {
+    e = (*v)(p->__pyx_t_0, a); if (e) return e;
+  }
+  return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Lattice[] = {
-  {__Pyx_NAMESTR("__unicode__"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_15__unicode__, METH_NOARGS, __Pyx_DOCSTR(0)},
-  {__Pyx_NAMESTR("todot"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_20todot, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Lattice_19todot)},
-  {__Pyx_NAMESTR("as_hypergraph"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_22as_hypergraph, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Lattice_21as_hypergraph)},
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_Lattice = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Lattice = {
-  __pyx_pw_5_cdec_7Lattice_11__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_5_cdec_Lattice, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Lattice = {
-  __pyx_pw_5_cdec_7Lattice_11__len__, /*mp_length*/
-  __pyx_pw_5_cdec_7Lattice_7__getitem__, /*mp_subscript*/
-  __pyx_mp_ass_subscript_5_cdec_Lattice, /*mp_ass_subscript*/
-};
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_outer_scope);
+  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_w);
+  p->__pyx_v_w = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_t_0);
+  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_Lattice = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_3_genexpr[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_Lattice = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_3_genexpr = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Lattice"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Lattice), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_3_genexpr"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Lattice, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_3_genexpr, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -22089,24 +21511,24 @@ static PyTypeObject __pyx_type_5_cdec_Lattice = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Lattice, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Lattice, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Lattice, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  __pyx_pw_5_cdec_7Lattice_13__str__, /*tp_str*/
+  0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Lattice, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_3_genexpr, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_3_genexpr, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_7Lattice_17__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Lattice, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_3_genexpr, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -22114,9 +21536,9 @@ static PyTypeObject __pyx_type_5_cdec_Lattice = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_7Lattice_3__init__, /*tp_init*/
+  0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Lattice, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_3_genexpr, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22130,153 +21552,22 @@ static PyTypeObject __pyx_type_5_cdec_Lattice = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Candidate(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static PyObject *__pyx_tp_new_5_cdec_MRule(PyTypeObject *t, PyObject *a, PyObject *k) {
+  PyObject *o = __pyx_tp_new_5_cdec_TRule(t, a, k);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Candidate(PyObject *o) {
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_9Candidate_words(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_9Candidate_5words_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_9Candidate_fmap(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_9Candidate_4fmap_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_5_cdec_9Candidate_score(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_9Candidate_5score_1__get__(o);
-}
-
-static int __pyx_setprop_5_cdec_9Candidate_score(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
-  if (v) {
-    return __pyx_pw_5_cdec_9Candidate_5score_3__set__(o, v);
-  }
-  else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
-  }
-}
-
-static PyMethodDef __pyx_methods_5_cdec_Candidate[] = {
+static PyMethodDef __pyx_methods_5_cdec_MRule[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_Candidate[] = {
-  {(char *)"words", __pyx_getprop_5_cdec_9Candidate_words, 0, 0, 0},
-  {(char *)"fmap", __pyx_getprop_5_cdec_9Candidate_fmap, 0, 0, 0},
-  {(char *)"score", __pyx_getprop_5_cdec_9Candidate_score, __pyx_setprop_5_cdec_9Candidate_score, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_Candidate = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Candidate = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Candidate = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_Candidate = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_Candidate = {
+static PyTypeObject __pyx_type_5_cdec_MRule = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Candidate"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Candidate), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.MRule"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_MRule), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Candidate, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_TRule, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -22286,16 +21577,20 @@ static PyTypeObject __pyx_type_5_cdec_Candidate = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Candidate, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Candidate, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Candidate, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
+  #if CYTHON_COMPILING_IN_PYPY
+  __pyx_pw_5_cdec_5TRule_5__str__, /*tp_str*/
+  #else
   0, /*tp_str*/
+  #endif
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Candidate, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
@@ -22303,17 +21598,17 @@ static PyTypeObject __pyx_type_5_cdec_Candidate = {
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Candidate, /*tp_methods*/
+  __pyx_methods_5_cdec_MRule, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_Candidate, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_5MRule_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Candidate, /*tp_new*/
+  __pyx_tp_new_5_cdec_MRule, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22327,154 +21622,38 @@ static PyTypeObject __pyx_type_5_cdec_Candidate = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_SufficientStats(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static PyObject *__pyx_tp_new_5_cdec_SegmentEvaluator(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_SufficientStats(PyObject *o) {
+static void __pyx_tp_dealloc_5_cdec_SegmentEvaluator(PyObject *o) {
   {
     PyObject *etype, *eval, *etb;
     PyErr_Fetch(&etype, &eval, &etb);
     ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_15SufficientStats_1__dealloc__(o);
+    __pyx_pw_5_cdec_16SegmentEvaluator_1__dealloc__(o);
     if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
     --Py_REFCNT(o);
     PyErr_Restore(etype, eval, etb);
   }
   (*Py_TYPE(o)->tp_free)(o);
 }
-static PyObject *__pyx_sq_item_5_cdec_SufficientStats(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
-}
-
-static PyObject *__pyx_getprop_5_cdec_15SufficientStats_score(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_15SufficientStats_5score_1__get__(o);
-}
 
-static PyObject *__pyx_getprop_5_cdec_15SufficientStats_detail(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_15SufficientStats_6detail_1__get__(o);
-}
-
-static PyMethodDef __pyx_methods_5_cdec_SufficientStats[] = {
+static PyMethodDef __pyx_methods_5_cdec_SegmentEvaluator[] = {
+  {__Pyx_NAMESTR("evaluate"), (PyCFunction)__pyx_pw_5_cdec_16SegmentEvaluator_3evaluate, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_16SegmentEvaluator_2evaluate)},
+  {__Pyx_NAMESTR("candidate_set"), (PyCFunction)__pyx_pw_5_cdec_16SegmentEvaluator_5candidate_set, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_16SegmentEvaluator_4candidate_set)},
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_SufficientStats[] = {
-  {(char *)"score", __pyx_getprop_5_cdec_15SufficientStats_score, 0, 0, 0},
-  {(char *)"detail", __pyx_getprop_5_cdec_15SufficientStats_detail, 0, 0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_SufficientStats = {
-  __pyx_pw_5_cdec_15SufficientStats_12__add__, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  __pyx_pw_5_cdec_15SufficientStats_10__iadd__, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_SufficientStats = {
-  __pyx_pw_5_cdec_15SufficientStats_3__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_5_cdec_SufficientStats, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_SufficientStats = {
-  __pyx_pw_5_cdec_15SufficientStats_3__len__, /*mp_length*/
-  __pyx_pw_5_cdec_15SufficientStats_8__getitem__, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_SufficientStats = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_SufficientStats = {
+static PyTypeObject __pyx_type_5_cdec_SegmentEvaluator = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.SufficientStats"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_SufficientStats), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.SegmentEvaluator"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_SegmentEvaluator), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_SufficientStats, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_SegmentEvaluator, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -22484,26 +21663,26 @@ static PyTypeObject __pyx_type_5_cdec_SufficientStats = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_SufficientStats, /*tp_as_number*/
-  &__pyx_tp_as_sequence_SufficientStats, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_SufficientStats, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_SufficientStats, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_15SufficientStats_5__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_SufficientStats, /*tp_methods*/
+  __pyx_methods_5_cdec_SegmentEvaluator, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_SufficientStats, /*tp_getset*/
+  0, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -22511,7 +21690,7 @@ static PyTypeObject __pyx_type_5_cdec_SufficientStats = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_SufficientStats, /*tp_new*/
+  __pyx_tp_new_5_cdec_SegmentEvaluator, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22525,144 +21704,81 @@ static PyTypeObject __pyx_type_5_cdec_SufficientStats = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_CandidateSet(PyTypeObject *t, PyObject *a, PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  if (__pyx_pw_5_cdec_12CandidateSet_1__cinit__(o, a, k) < 0) {
-    Py_DECREF(o); o = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *__pyx_freelist_5_cdec___pyx_scope_struct_25_genexpr[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_25_genexpr = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_25_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_25_genexpr > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_25_genexpr[--__pyx_freecount_5_cdec___pyx_scope_struct_25_genexpr];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
   }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o);
+  p->__pyx_outer_scope = 0;
+  p->__pyx_v_kv = 0;
+  p->__pyx_t_0 = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_CandidateSet(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_12CandidateSet_3__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_outer_scope);
+  Py_CLEAR(p->__pyx_v_kv);
+  Py_CLEAR(p->__pyx_t_0);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_25_genexpr < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_25_genexpr[__pyx_freecount_5_cdec___pyx_scope_struct_25_genexpr++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
   }
-  (*Py_TYPE(o)->tp_free)(o);
-}
-static PyObject *__pyx_sq_item_5_cdec_CandidateSet(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_CandidateSet[] = {
-  {__Pyx_NAMESTR("add_kbest"), (PyCFunction)__pyx_pw_5_cdec_12CandidateSet_12add_kbest, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_12CandidateSet_11add_kbest)},
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_CandidateSet = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_CandidateSet = {
-  __pyx_pw_5_cdec_12CandidateSet_5__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_5_cdec_CandidateSet, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
+  if (p->__pyx_outer_scope) {
+    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
+  }
+  if (p->__pyx_v_kv) {
+    e = (*v)(p->__pyx_v_kv, a); if (e) return e;
+  }
+  if (p->__pyx_t_0) {
+    e = (*v)(p->__pyx_t_0, a); if (e) return e;
+  }
+  return 0;
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_CandidateSet = {
-  __pyx_pw_5_cdec_12CandidateSet_5__len__, /*mp_length*/
-  __pyx_pw_5_cdec_12CandidateSet_7__getitem__, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_outer_scope);
+  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_kv);
+  p->__pyx_v_kv = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_t_0);
+  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_CandidateSet = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_25_genexpr[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_CandidateSet = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_25_genexpr = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.CandidateSet"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_CandidateSet), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_25_genexpr"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_CandidateSet, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_25_genexpr, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -22672,24 +21788,24 @@ static PyTypeObject __pyx_type_5_cdec_CandidateSet = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_CandidateSet, /*tp_as_number*/
-  &__pyx_tp_as_sequence_CandidateSet, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_CandidateSet, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_CandidateSet, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_25_genexpr, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_25_genexpr, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  __pyx_pw_5_cdec_12CandidateSet_9__iter__, /*tp_iter*/
+  0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_CandidateSet, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_25_genexpr, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -22699,7 +21815,7 @@ static PyTypeObject __pyx_type_5_cdec_CandidateSet = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_CandidateSet, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_25_genexpr, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22713,135 +21829,65 @@ static PyTypeObject __pyx_type_5_cdec_CandidateSet = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_SegmentEvaluator(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *__pyx_freelist_5_cdec___pyx_scope_struct_19_todot[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_19_todot = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_19_todot(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_19_todot > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_19_todot[--__pyx_freecount_5_cdec___pyx_scope_struct_19_todot];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_SegmentEvaluator(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_16SegmentEvaluator_1__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_19_todot(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+  PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_19_todot < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_19_todot[__pyx_freecount_5_cdec___pyx_scope_struct_19_todot++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
   }
-  (*Py_TYPE(o)->tp_free)(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec_SegmentEvaluator[] = {
-  {__Pyx_NAMESTR("evaluate"), (PyCFunction)__pyx_pw_5_cdec_16SegmentEvaluator_3evaluate, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_16SegmentEvaluator_2evaluate)},
-  {__Pyx_NAMESTR("candidate_set"), (PyCFunction)__pyx_pw_5_cdec_16SegmentEvaluator_5candidate_set, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_16SegmentEvaluator_4candidate_set)},
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_SegmentEvaluator = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_SegmentEvaluator = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_19_todot(PyObject *o, visitproc v, void *a) {
+  int e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  }
+  return 0;
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_SegmentEvaluator = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_19_todot(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+  PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Lattice *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  return 0;
+}
 
-static PyBufferProcs __pyx_tp_as_buffer_SegmentEvaluator = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_19_todot[] = {
+  {0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_SegmentEvaluator = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_19_todot = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.SegmentEvaluator"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_SegmentEvaluator), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_19_todot"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_SegmentEvaluator, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_19_todot, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -22851,24 +21897,24 @@ static PyTypeObject __pyx_type_5_cdec_SegmentEvaluator = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_SegmentEvaluator, /*tp_as_number*/
-  &__pyx_tp_as_sequence_SegmentEvaluator, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_SegmentEvaluator, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_SegmentEvaluator, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_19_todot, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_19_todot, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_SegmentEvaluator, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_19_todot, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -22878,7 +21924,7 @@ static PyTypeObject __pyx_type_5_cdec_SegmentEvaluator = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_SegmentEvaluator, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_19_todot, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22892,136 +21938,56 @@ static PyTypeObject __pyx_type_5_cdec_SegmentEvaluator = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Scorer(PyTypeObject *t, PyObject *a, PyObject *k) {
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  if (__pyx_pw_5_cdec_6Scorer_1__cinit__(o, a, k) < 0) {
-    Py_DECREF(o); o = 0;
-  }
+static PyObject *__pyx_tp_new_5_cdec_Candidate(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Scorer(PyObject *o) {
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_6Scorer_3__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
-  }
+static void __pyx_tp_dealloc_5_cdec_Candidate(PyObject *o) {
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Scorer[] = {
-  {0, 0, 0, 0}
-};
+static PyObject *__pyx_getprop_5_cdec_9Candidate_words(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_9Candidate_5words_1__get__(o);
+}
 
-static PyNumberMethods __pyx_tp_as_number_Scorer = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static PyObject *__pyx_getprop_5_cdec_9Candidate_fmap(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_9Candidate_4fmap_1__get__(o);
+}
 
-static PySequenceMethods __pyx_tp_as_sequence_Scorer = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static PyObject *__pyx_getprop_5_cdec_9Candidate_score(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_9Candidate_5score_1__get__(o);
+}
 
-static PyMappingMethods __pyx_tp_as_mapping_Scorer = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
+static int __pyx_setprop_5_cdec_9Candidate_score(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_9Candidate_5score_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
+
+static PyMethodDef __pyx_methods_5_cdec_Candidate[] = {
+  {0, 0, 0, 0}
 };
 
-static PyBufferProcs __pyx_tp_as_buffer_Scorer = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_Candidate[] = {
+  {(char *)"words", __pyx_getprop_5_cdec_9Candidate_words, 0, 0, 0},
+  {(char *)"fmap", __pyx_getprop_5_cdec_9Candidate_fmap, 0, 0, 0},
+  {(char *)"score", __pyx_getprop_5_cdec_9Candidate_score, __pyx_setprop_5_cdec_9Candidate_score, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec_Scorer = {
+static PyTypeObject __pyx_type_5_cdec_Candidate = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Scorer"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Scorer), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Candidate"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Candidate), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Scorer, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Candidate, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -23031,16 +21997,16 @@ static PyTypeObject __pyx_type_5_cdec_Scorer = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Scorer, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Scorer, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Scorer, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
-  __pyx_pw_5_cdec_6Scorer_5__call__, /*tp_call*/
-  __pyx_pw_5_cdec_6Scorer_7__str__, /*tp_str*/
+  0, /*tp_call*/
+  0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Scorer, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
   0, /*tp_traverse*/
   0, /*tp_clear*/
@@ -23048,9 +22014,9 @@ static PyTypeObject __pyx_type_5_cdec_Scorer = {
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Scorer, /*tp_methods*/
+  __pyx_methods_5_cdec_Candidate, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_Candidate, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -23058,7 +22024,7 @@ static PyTypeObject __pyx_type_5_cdec_Scorer = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Scorer, /*tp_new*/
+  __pyx_tp_new_5_cdec_Candidate, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -23072,154 +22038,81 @@ static PyTypeObject __pyx_type_5_cdec_Scorer = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Metric(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_Metric *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_Metric *)o);
-  p->scorer = ((struct __pyx_obj_5_cdec_Scorer *)Py_None); Py_INCREF(Py_None);
-  if (__pyx_pw_5_cdec_6Metric_1__cinit__(o, __pyx_empty_tuple, NULL) < 0) {
-    Py_DECREF(o); o = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *__pyx_freelist_5_cdec___pyx_scope_struct_6_genexpr[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_6_genexpr = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_6_genexpr > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_6_genexpr[--__pyx_freecount_5_cdec___pyx_scope_struct_6_genexpr];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
   }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o);
+  p->__pyx_outer_scope = 0;
+  p->__pyx_v_feat = 0;
+  p->__pyx_t_0 = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Metric(PyObject *o) {
-  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->scorer);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_outer_scope);
+  Py_CLEAR(p->__pyx_v_feat);
+  Py_CLEAR(p->__pyx_t_0);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_6_genexpr < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_6_genexpr[__pyx_freecount_5_cdec___pyx_scope_struct_6_genexpr++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec_Metric(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
-  if (p->scorer) {
-    e = (*v)(((PyObject*)p->scorer), a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
+  if (p->__pyx_outer_scope) {
+    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
+  }
+  if (p->__pyx_v_feat) {
+    e = (*v)(p->__pyx_v_feat, a); if (e) return e;
+  }
+  if (p->__pyx_t_0) {
+    e = (*v)(p->__pyx_t_0, a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec_Metric(PyObject *o) {
-  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->scorer);
-  p->scorer = ((struct __pyx_obj_5_cdec_Scorer *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_outer_scope);
+  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_feat);
+  p->__pyx_v_feat = Py_None; Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_t_0);
+  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Metric[] = {
-  {__Pyx_NAMESTR("score"), (PyCFunction)__pyx_pw_5_cdec_6Metric_5score, METH_NOARGS, __Pyx_DOCSTR(0)},
-  {__Pyx_NAMESTR("evaluate"), (PyCFunction)__pyx_pw_5_cdec_6Metric_7evaluate, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(0)},
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_6_genexpr[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number_Metric = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Metric = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Metric = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_Metric = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_Metric = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_6_genexpr = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Metric"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Metric), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_6_genexpr"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Metric, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_6_genexpr, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -23229,24 +22122,24 @@ static PyTypeObject __pyx_type_5_cdec_Metric = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Metric, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Metric, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Metric, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
-  __pyx_pw_5_cdec_6Metric_3__call__, /*tp_call*/
+  0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Metric, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec_Metric, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec_Metric, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_6_genexpr, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_6_genexpr, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Metric, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_6_genexpr, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -23256,7 +22149,7 @@ static PyTypeObject __pyx_type_5_cdec_Metric = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Metric, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -23270,184 +22163,84 @@ static PyTypeObject __pyx_type_5_cdec_Metric = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec_Decoder(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec_Decoder *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec_Decoder *)o);
-  p->weights = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
+static PyObject *__pyx_tp_new_5_cdec_NT(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_NT *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_NT *)o);
+  p->cat = ((PyObject*)Py_None); Py_INCREF(Py_None);
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec_Decoder(PyObject *o) {
-  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
+static void __pyx_tp_dealloc_5_cdec_NT(PyObject *o) {
+  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
   PyObject_GC_UnTrack(o);
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_5_cdec_7Decoder_3__dealloc__(o);
-    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
-  }
-  Py_CLEAR(p->weights);
-  PyObject_GC_Track(o);
+  Py_CLEAR(p->cat);
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec_Decoder(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec_NT(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
-  if (p->weights) {
-    e = (*v)(((PyObject*)p->weights), a); if (e) return e;
+  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
+  if (p->cat) {
+    e = (*v)(p->cat, a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec_Decoder(PyObject *o) {
-  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
+static int __pyx_tp_clear_5_cdec_NT(PyObject *o) {
+  struct __pyx_obj_5_cdec_NT *p = (struct __pyx_obj_5_cdec_NT *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->weights);
-  p->weights = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->cat);
+  p->cat = ((PyObject*)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyObject *__pyx_getprop_5_cdec_7Decoder_weights(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_7Decoder_7weights_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_2NT_cat(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_2NT_3cat_1__get__(o);
 }
 
-static int __pyx_setprop_5_cdec_7Decoder_weights(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+static int __pyx_setprop_5_cdec_2NT_cat(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
   if (v) {
-    return __pyx_pw_5_cdec_7Decoder_7weights_3__set__(o, v);
+    return __pyx_pw_5_cdec_2NT_3cat_3__set__(o, v);
   }
   else {
-    PyErr_SetString(PyExc_NotImplementedError, "__del__");
-    return -1;
+    return __pyx_pw_5_cdec_2NT_3cat_5__del__(o);
   }
 }
 
-static PyObject *__pyx_getprop_5_cdec_7Decoder_formalism(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_5_cdec_7Decoder_9formalism_1__get__(o);
+static PyObject *__pyx_getprop_5_cdec_2NT_ref(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_2NT_3ref_1__get__(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec_Decoder[] = {
-  {__Pyx_NAMESTR("read_weights"), (PyCFunction)__pyx_pw_5_cdec_7Decoder_5read_weights, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Decoder_4read_weights)},
-  {__Pyx_NAMESTR("translate"), (PyCFunction)__pyx_pw_5_cdec_7Decoder_7translate, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Decoder_6translate)},
+static int __pyx_setprop_5_cdec_2NT_ref(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_2NT_3ref_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
+
+static PyMethodDef __pyx_methods_5_cdec_NT[] = {
   {0, 0, 0, 0}
 };
 
-static struct PyGetSetDef __pyx_getsets_5_cdec_Decoder[] = {
-  {(char *)"weights", __pyx_getprop_5_cdec_7Decoder_weights, __pyx_setprop_5_cdec_7Decoder_weights, 0, 0},
-  {(char *)"formalism", __pyx_getprop_5_cdec_7Decoder_formalism, 0, 0, 0},
+static struct PyGetSetDef __pyx_getsets_5_cdec_NT[] = {
+  {(char *)"cat", __pyx_getprop_5_cdec_2NT_cat, __pyx_setprop_5_cdec_2NT_cat, 0, 0},
+  {(char *)"ref", __pyx_getprop_5_cdec_2NT_ref, __pyx_setprop_5_cdec_2NT_ref, 0, 0},
   {0, 0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number_Decoder = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Decoder = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Decoder = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer_Decoder = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec_Decoder = {
+static PyTypeObject __pyx_type_5_cdec_NT = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.Decoder"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec_Decoder), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.NT"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_NT), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec_Decoder, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_NT, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -23457,34 +22250,34 @@ static PyTypeObject __pyx_type_5_cdec_Decoder = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number_Decoder, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Decoder, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Decoder, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  0, /*tp_str*/
+  __pyx_pw_5_cdec_2NT_3__str__, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer_Decoder, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec_Decoder, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec_Decoder, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec_NT, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec_NT, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec_Decoder, /*tp_methods*/
+  __pyx_methods_5_cdec_NT, /*tp_methods*/
   0, /*tp_members*/
-  __pyx_getsets_5_cdec_Decoder, /*tp_getset*/
+  __pyx_getsets_5_cdec_NT, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  __pyx_pw_5_cdec_7Decoder_1__init__, /*tp_init*/
+  __pyx_pw_5_cdec_2NT_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec_Decoder, /*tp_new*/
+  __pyx_tp_new_5_cdec_NT, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -23497,106 +22290,98 @@ static PyTypeObject __pyx_type_5_cdec_Decoder = {
   0, /*tp_version_tag*/
   #endif
 };
+static struct __pyx_vtabstruct_5_cdec_HypergraphEdge __pyx_vtable_5_cdec_HypergraphEdge;
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct____iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o);
-  p->__pyx_v_self = 0;
+static PyObject *__pyx_tp_new_5_cdec_HypergraphEdge(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_HypergraphEdge *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_HypergraphEdge *)o);
+  p->__pyx_vtab = __pyx_vtabptr_5_cdec_HypergraphEdge;
+  p->trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct____iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
+static void __pyx_tp_dealloc_5_cdec_HypergraphEdge(PyObject *o) {
+  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
+  Py_CLEAR(p->trule);
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct____iter__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec_HypergraphEdge(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
+  if (p->trule) {
+    e = (*v)(((PyObject*)p->trule), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct____iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
+static int __pyx_tp_clear_5_cdec_HypergraphEdge(PyObject *o) {
+  struct __pyx_obj_5_cdec_HypergraphEdge *p = (struct __pyx_obj_5_cdec_HypergraphEdge *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->trule);
+  p->trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct____iter__[] = {
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_head_node(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_9head_node_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_tail_nodes(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_10tail_nodes_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_span(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_4span_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_src_span(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_8src_span_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_feature_values(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_14feature_values_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_prob(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_4prob_1__get__(o);
+}
+
+static PyObject *__pyx_getprop_5_cdec_14HypergraphEdge_trule(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphEdge_5trule_1__get__(o);
+}
+
+static int __pyx_setprop_5_cdec_14HypergraphEdge_trule(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_14HypergraphEdge_5trule_3__set__(o, v);
+  }
+  else {
+    return __pyx_pw_5_cdec_14HypergraphEdge_5trule_5__del__(o);
+  }
+}
+
+static PyMethodDef __pyx_methods_5_cdec_HypergraphEdge[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct____iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_HypergraphEdge[] = {
+  {(char *)"head_node", __pyx_getprop_5_cdec_14HypergraphEdge_head_node, 0, 0, 0},
+  {(char *)"tail_nodes", __pyx_getprop_5_cdec_14HypergraphEdge_tail_nodes, 0, 0, 0},
+  {(char *)"span", __pyx_getprop_5_cdec_14HypergraphEdge_span, 0, 0, 0},
+  {(char *)"src_span", __pyx_getprop_5_cdec_14HypergraphEdge_src_span, 0, 0, 0},
+  {(char *)"feature_values", __pyx_getprop_5_cdec_14HypergraphEdge_feature_values, 0, 0, 0},
+  {(char *)"prob", __pyx_getprop_5_cdec_14HypergraphEdge_prob, 0, 0, 0},
+  {(char *)"trule", __pyx_getprop_5_cdec_14HypergraphEdge_trule, __pyx_setprop_5_cdec_14HypergraphEdge_trule, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct____iter__ = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_HypergraphEdge = {
+  __pyx_pw_5_cdec_14HypergraphEdge_1__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
   0, /*sq_item*/
@@ -23608,39 +22393,18 @@ static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct____iter__ = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct____iter__ = {
-  0, /*mp_length*/
+static PyMappingMethods __pyx_tp_as_mapping_HypergraphEdge = {
+  __pyx_pw_5_cdec_14HypergraphEdge_1__len__, /*mp_length*/
   0, /*mp_subscript*/
   0, /*mp_ass_subscript*/
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct____iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct____iter__ = {
+static PyTypeObject __pyx_type_5_cdec_HypergraphEdge = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct____iter__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct____iter__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.HypergraphEdge"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_HypergraphEdge), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct____iter__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_HypergraphEdge, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -23650,26 +22414,26 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct____iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct____iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct____iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct____iter__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  &__pyx_tp_as_sequence_HypergraphEdge, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_HypergraphEdge, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct____iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct____iter__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct____iter__, /*tp_clear*/
-  0, /*tp_richcompare*/
+  __pyx_tp_traverse_5_cdec_HypergraphEdge, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec_HypergraphEdge, /*tp_clear*/
+  __pyx_pw_5_cdec_14HypergraphEdge_3__richcmp__, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct____iter__, /*tp_methods*/
+  __pyx_methods_5_cdec_HypergraphEdge, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_HypergraphEdge, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -23677,7 +22441,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct____iter__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct____iter__, /*tp_new*/
+  __pyx_tp_new_5_cdec_HypergraphEdge, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -23691,10 +22455,21 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct____iter__ = {
   #endif
 };
 
+static struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *__pyx_freelist_5_cdec___pyx_scope_struct_1___iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_1___iter__ = 0;
+
 static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_1___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
   struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_1___iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_1___iter__[--__pyx_freecount_5_cdec___pyx_scope_struct_1___iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
   p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *)o);
   p->__pyx_v_self = 0;
   return o;
@@ -23704,8 +22479,11 @@ static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_1___iter__(PyObject *o) {
   struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_1___iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_1___iter__[__pyx_freecount_5_cdec___pyx_scope_struct_1___iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_1___iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
 static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_1___iter__(PyObject *o, visitproc v, void *a) {
@@ -23730,104 +22508,6 @@ static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_1___iter__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_1___iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_1___iter__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_1___iter__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_1___iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
 static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_1___iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
   __Pyx_NAMESTR("_cdec.__pyx_scope_struct_1___iter__"), /*tp_name*/
@@ -23843,16 +22523,16 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_1___iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_1___iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_1___iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_1___iter__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_1___iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
   __pyx_tp_traverse_5_cdec___pyx_scope_struct_1___iter__, /*tp_traverse*/
   __pyx_tp_clear_5_cdec___pyx_scope_struct_1___iter__, /*tp_clear*/
@@ -23884,149 +22564,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_1___iter__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_2__phrase(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o);
-  p->__pyx_v_phrase = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_16___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_16___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_16___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_16___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_16___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_16___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_2__phrase(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_16___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_phrase);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_16___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_16___get__[__pyx_freecount_5_cdec___pyx_scope_struct_16___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_2__phrase(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_16___get__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
-  if (p->__pyx_v_phrase) {
-    e = (*v)(p->__pyx_v_phrase, a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_2__phrase(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_16___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_phrase);
-  p->__pyx_v_phrase = Py_None; Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphNode *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_2__phrase[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_16___get__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_2__phrase = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_2__phrase = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_2__phrase = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_2__phrase = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_2__phrase = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_16___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_2__phrase"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_16___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_2__phrase, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_16___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -24036,24 +22632,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_2__phrase = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_2__phrase, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_2__phrase, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_2__phrase, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_2__phrase, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_2__phrase, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_2__phrase, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_16___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_16___get__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_2__phrase, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_16___get__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -24063,7 +22659,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_2__phrase = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_2__phrase, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_16___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -24077,165 +22673,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_2__phrase = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_3_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o);
-  p->__pyx_outer_scope = 0;
-  p->__pyx_v_w = 0;
-  p->__pyx_t_0 = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_4___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_4___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_4___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_4___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_4___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_4___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o);
+  p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_4___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_outer_scope);
-  Py_CLEAR(p->__pyx_v_w);
-  Py_CLEAR(p->__pyx_t_0);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_self);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_4___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_4___get__[__pyx_freecount_5_cdec___pyx_scope_struct_4___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_4___get__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
-  if (p->__pyx_outer_scope) {
-    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
-  }
-  if (p->__pyx_v_w) {
-    e = (*v)(p->__pyx_v_w, a); if (e) return e;
-  }
-  if (p->__pyx_t_0) {
-    e = (*v)(p->__pyx_t_0, a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
+  if (p->__pyx_v_self) {
+    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_3_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_4___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_outer_scope);
-  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_2__phrase *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_w);
-  p->__pyx_v_w = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_0);
-  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_v_self);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_3_genexpr[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_4___get__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_3_genexpr = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_3_genexpr = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_3_genexpr = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_3_genexpr = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_3_genexpr = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_4___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_3_genexpr"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_3_genexpr), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_4___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_3_genexpr, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_4___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -24245,24 +22741,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_3_genexpr = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_3_genexpr, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_3_genexpr, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_3_genexpr, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_3_genexpr, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_3_genexpr, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_3_genexpr, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_4___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_4___get__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_3_genexpr, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_4___get__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -24272,7 +22768,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_3_genexpr = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_3_genexpr, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_4___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -24286,149 +22782,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_3_genexpr = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_4___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *__pyx_freelist_5_cdec___pyx_scope_struct_18___iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_18___iter__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_18___iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_18___iter__[--__pyx_freecount_5_cdec___pyx_scope_struct_18___iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o);
   p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_4___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_18___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_18___iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_18___iter__[__pyx_freecount_5_cdec___pyx_scope_struct_18___iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_4___get__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_18___iter__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_4___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_18___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Lattice *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_4___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_18___iter__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_4___get__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_4___get__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_4___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_4___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_4___get__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_18___iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_4___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_4___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_18___iter__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_4___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_18___iter__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -24438,24 +22850,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_4___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_4___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_4___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_4___get__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_4___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_4___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_4___get__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_18___iter__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_18___iter__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_4___get__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_18___iter__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -24465,7 +22877,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_4___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_4___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -24479,149 +22891,86 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_4___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_5___str__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o);
-  p->__pyx_v_self = 0;
+static PyObject *__pyx_tp_new_5_cdec_Decoder(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_Decoder *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_Decoder *)o);
+  p->weights = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_5___str__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
+static void __pyx_tp_dealloc_5_cdec_Decoder(PyObject *o) {
+  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_7Decoder_3__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
+  Py_CLEAR(p->weights);
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_5___str__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec_Decoder(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
+  if (p->weights) {
+    e = (*v)(((PyObject*)p->weights), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_5___str__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
+static int __pyx_tp_clear_5_cdec_Decoder(PyObject *o) {
+  struct __pyx_obj_5_cdec_Decoder *p = (struct __pyx_obj_5_cdec_Decoder *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->weights);
+  p->weights = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_5___str__[] = {
-  {0, 0, 0, 0}
-};
+static PyObject *__pyx_getprop_5_cdec_7Decoder_weights(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_7Decoder_7weights_1__get__(o);
+}
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_5___str__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static int __pyx_setprop_5_cdec_7Decoder_weights(PyObject *o, PyObject *v, CYTHON_UNUSED void *x) {
+  if (v) {
+    return __pyx_pw_5_cdec_7Decoder_7weights_3__set__(o, v);
+  }
+  else {
+    PyErr_SetString(PyExc_NotImplementedError, "__del__");
+    return -1;
+  }
+}
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_5___str__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static PyObject *__pyx_getprop_5_cdec_7Decoder_formalism(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_7Decoder_9formalism_1__get__(o);
+}
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_5___str__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
+static PyMethodDef __pyx_methods_5_cdec_Decoder[] = {
+  {__Pyx_NAMESTR("read_weights"), (PyCFunction)__pyx_pw_5_cdec_7Decoder_5read_weights, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Decoder_4read_weights)},
+  {__Pyx_NAMESTR("translate"), (PyCFunction)__pyx_pw_5_cdec_7Decoder_7translate, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Decoder_6translate)},
+  {0, 0, 0, 0}
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_5___str__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_Decoder[] = {
+  {(char *)"weights", __pyx_getprop_5_cdec_7Decoder_weights, __pyx_setprop_5_cdec_7Decoder_weights, 0, 0},
+  {(char *)"formalism", __pyx_getprop_5_cdec_7Decoder_formalism, 0, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_5___str__ = {
+static PyTypeObject __pyx_type_5_cdec_Decoder = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_5___str__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Decoder"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Decoder), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_5___str__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Decoder, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -24631,34 +22980,34 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_5___str__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_5___str__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_5___str__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_5___str__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_5___str__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_5___str__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_5___str__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec_Decoder, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec_Decoder, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_5___str__, /*tp_methods*/
+  __pyx_methods_5_cdec_Decoder, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_Decoder, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_7Decoder_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_5___str__, /*tp_new*/
+  __pyx_tp_new_5_cdec_Decoder, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -24671,166 +23020,56 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_5___str__ = {
   0, /*tp_version_tag*/
   #endif
 };
+static struct __pyx_vtabstruct_5_cdec_HypergraphNode __pyx_vtable_5_cdec_HypergraphNode;
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o);
-  p->__pyx_outer_scope = 0;
-  p->__pyx_v_feat = 0;
-  p->__pyx_t_0 = 0;
+static PyObject *__pyx_tp_new_5_cdec_HypergraphNode(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_HypergraphNode *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_HypergraphNode *)o);
+  p->__pyx_vtab = __pyx_vtabptr_5_cdec_HypergraphNode;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_outer_scope);
-  Py_CLEAR(p->__pyx_v_feat);
-  Py_CLEAR(p->__pyx_t_0);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_HypergraphNode(PyObject *o) {
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
-  if (p->__pyx_outer_scope) {
-    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
-  }
-  if (p->__pyx_v_feat) {
-    e = (*v)(p->__pyx_v_feat, a); if (e) return e;
-  }
-  if (p->__pyx_t_0) {
-    e = (*v)(p->__pyx_t_0, a); if (e) return e;
-  }
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_in_edges(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphNode_8in_edges_1__get__(o);
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_6_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_outer_scope);
-  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_feat);
-  p->__pyx_v_feat = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_0);
-  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_out_edges(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphNode_9out_edges_1__get__(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_6_genexpr[] = {
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_6_genexpr = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_span(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphNode_4span_1__get__(o);
+}
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_6_genexpr = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static PyObject *__pyx_getprop_5_cdec_14HypergraphNode_cat(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_14HypergraphNode_3cat_1__get__(o);
+}
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_6_genexpr = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
+static PyMethodDef __pyx_methods_5_cdec_HypergraphNode[] = {
+  {0, 0, 0, 0}
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_6_genexpr = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_HypergraphNode[] = {
+  {(char *)"in_edges", __pyx_getprop_5_cdec_14HypergraphNode_in_edges, 0, 0, 0},
+  {(char *)"out_edges", __pyx_getprop_5_cdec_14HypergraphNode_out_edges, 0, 0, 0},
+  {(char *)"span", __pyx_getprop_5_cdec_14HypergraphNode_span, 0, 0, 0},
+  {(char *)"cat", __pyx_getprop_5_cdec_14HypergraphNode_cat, 0, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_6_genexpr = {
+static PyTypeObject __pyx_type_5_cdec_HypergraphNode = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_6_genexpr"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_6_genexpr), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.HypergraphNode"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_HypergraphNode), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_6_genexpr, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_HypergraphNode, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -24840,26 +23079,26 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_6_genexpr = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_6_genexpr, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_6_genexpr, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_6_genexpr, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_6_genexpr, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_6_genexpr, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_6_genexpr, /*tp_clear*/
-  0, /*tp_richcompare*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
+  __pyx_pw_5_cdec_14HypergraphNode_1__richcmp__, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_6_genexpr, /*tp_methods*/
+  __pyx_methods_5_cdec_HypergraphNode, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_HypergraphNode, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -24867,7 +23106,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_6_genexpr = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_6_genexpr, /*tp_new*/
+  __pyx_tp_new_5_cdec_HypergraphNode, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -24881,64 +23120,61 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_6_genexpr = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_7___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o);
-  p->__pyx_v_self = 0;
-  p->__pyx_v_trule = 0;
+static PyObject *__pyx_tp_new_5_cdec_SparseVector(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_7___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  Py_CLEAR(p->__pyx_v_trule);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_SparseVector(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_12SparseVector_3__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
+static PyObject *__pyx_sq_item_5_cdec_SparseVector(PyObject *o, Py_ssize_t i) {
+  PyObject *r;
+  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
+  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
+  Py_DECREF(x);
+  return r;
+}
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_7___iter__(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+static int __pyx_mp_ass_subscript_5_cdec_SparseVector(PyObject *o, PyObject *i, PyObject *v) {
+  if (v) {
+    return __pyx_pw_5_cdec_12SparseVector_9__setitem__(o, i, v);
   }
-  if (p->__pyx_v_trule) {
-    e = (*v)(((PyObject*)p->__pyx_v_trule), a); if (e) return e;
+  else {
+    PyErr_Format(PyExc_NotImplementedError,
+      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
+    return -1;
   }
-  return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_7___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Grammar *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_trule);
-  p->__pyx_v_trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_7___iter__[] = {
+static PyMethodDef __pyx_methods_5_cdec_SparseVector[] = {
+  {__Pyx_NAMESTR("copy"), (PyCFunction)__pyx_pw_5_cdec_12SparseVector_5copy, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_12SparseVector_4copy)},
+  {__Pyx_NAMESTR("dot"), (PyCFunction)__pyx_pw_5_cdec_12SparseVector_14dot, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_12SparseVector_13dot)},
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_7___iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
+static PyNumberMethods __pyx_tp_as_number_SparseVector = {
+  __pyx_pw_5_cdec_12SparseVector_32__add__, /*nb_add*/
+  __pyx_pw_5_cdec_12SparseVector_34__sub__, /*nb_subtract*/
+  __pyx_pw_5_cdec_12SparseVector_36__mul__, /*nb_multiply*/
   #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
+  __pyx_pw_5_cdec_12SparseVector_38__div__, /*nb_divide*/
   #endif
   0, /*nb_remainder*/
   0, /*nb_divmod*/
   0, /*nb_power*/
-  0, /*nb_negative*/
+  __pyx_pw_5_cdec_12SparseVector_22__neg__, /*nb_negative*/
   0, /*nb_positive*/
   0, /*nb_absolute*/
   0, /*nb_nonzero*/
@@ -24964,11 +23200,11 @@ static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_7___iter__ = {
   #if PY_MAJOR_VERSION < 3
   0, /*nb_hex*/
   #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
+  __pyx_pw_5_cdec_12SparseVector_24__iadd__, /*nb_inplace_add*/
+  __pyx_pw_5_cdec_12SparseVector_26__isub__, /*nb_inplace_subtract*/
+  __pyx_pw_5_cdec_12SparseVector_28__imul__, /*nb_inplace_multiply*/
   #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
+  __pyx_pw_5_cdec_12SparseVector_30__idiv__, /*nb_inplace_divide*/
   #endif
   0, /*nb_inplace_remainder*/
   0, /*nb_inplace_power*/
@@ -24986,52 +23222,31 @@ static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_7___iter__ = {
   #endif
 };
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_7___iter__ = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_SparseVector = {
+  __pyx_pw_5_cdec_12SparseVector_18__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
-  0, /*sq_item*/
+  __pyx_sq_item_5_cdec_SparseVector, /*sq_item*/
   0, /*sq_slice*/
   0, /*sq_ass_item*/
   0, /*sq_ass_slice*/
-  0, /*sq_contains*/
+  __pyx_pw_5_cdec_12SparseVector_20__contains__, /*sq_contains*/
   0, /*sq_inplace_concat*/
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_7___iter__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_7___iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMappingMethods __pyx_tp_as_mapping_SparseVector = {
+  __pyx_pw_5_cdec_12SparseVector_18__len__, /*mp_length*/
+  __pyx_pw_5_cdec_12SparseVector_7__getitem__, /*mp_subscript*/
+  __pyx_mp_ass_subscript_5_cdec_SparseVector, /*mp_ass_subscript*/
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_7___iter__ = {
+static PyTypeObject __pyx_type_5_cdec_SparseVector = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_7___iter__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.SparseVector"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_SparseVector), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_7___iter__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_SparseVector, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -25041,24 +23256,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_7___iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_7___iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_7___iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_7___iter__, /*tp_as_mapping*/
+  &__pyx_tp_as_number_SparseVector, /*tp_as_number*/
+  &__pyx_tp_as_sequence_SparseVector, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_SparseVector, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_7___iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_7___iter__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_7___iter__, /*tp_clear*/
-  0, /*tp_richcompare*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
+  __pyx_pw_5_cdec_12SparseVector_16__richcmp__, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_12SparseVector_11__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_7___iter__, /*tp_methods*/
+  __pyx_methods_5_cdec_SparseVector, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -25066,9 +23281,9 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_7___iter__ = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_12SparseVector_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_7___iter__, /*tp_new*/
+  __pyx_tp_new_5_cdec_SparseVector, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -25082,157 +23297,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_7___iter__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_17___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_17___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_17___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_17___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_17___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_17___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o);
   p->__pyx_v_self = 0;
-  p->__pyx_v_size = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_8_kbest(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_17___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  Py_CLEAR(p->__pyx_v_size);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_17___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_17___get__[__pyx_freecount_5_cdec___pyx_scope_struct_17___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_8_kbest(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_17___get__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
-  if (p->__pyx_v_size) {
-    e = (*v)(p->__pyx_v_size, a); if (e) return e;
-  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_8_kbest(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_17___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_size);
-  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphNode *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_8_kbest[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_17___get__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_8_kbest = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_8_kbest = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_8_kbest = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_8_kbest = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_8_kbest = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_17___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_8_kbest"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_17___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_8_kbest, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_17___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -25242,24 +23365,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_8_kbest = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_8_kbest, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_8_kbest, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_8_kbest, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_8_kbest, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_8_kbest, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_8_kbest, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_17___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_17___get__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_8_kbest, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_17___get__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -25269,7 +23392,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_8_kbest = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_17___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -25283,173 +23406,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_8_kbest = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o);
-  p->__pyx_v_e_tree = 0;
-  p->__pyx_v_f_tree = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *__pyx_freelist_5_cdec___pyx_scope_struct____iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct____iter__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct____iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct____iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct____iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct____iter__[--__pyx_freecount_5_cdec___pyx_scope_struct____iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct____iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o);
   p->__pyx_v_self = 0;
-  p->__pyx_v_size = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct____iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_e_tree);
-  Py_CLEAR(p->__pyx_v_f_tree);
   Py_CLEAR(p->__pyx_v_self);
-  Py_CLEAR(p->__pyx_v_size);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct____iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct____iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct____iter__[__pyx_freecount_5_cdec___pyx_scope_struct____iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct____iter__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
-  if (p->__pyx_v_e_tree) {
-    e = (*v)(p->__pyx_v_e_tree, a); if (e) return e;
-  }
-  if (p->__pyx_v_f_tree) {
-    e = (*v)(p->__pyx_v_f_tree, a); if (e) return e;
-  }
+  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
-  if (p->__pyx_v_size) {
-    e = (*v)(p->__pyx_v_size, a); if (e) return e;
-  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct____iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct____iter__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_e_tree);
-  p->__pyx_v_e_tree = ((PyObject*)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_f_tree);
-  p->__pyx_v_f_tree = ((PyObject*)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_size);
-  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_DenseVector *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_9_kbest_trees[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct____iter__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_9_kbest_trees = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_9_kbest_trees = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_9_kbest_trees = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_9_kbest_trees = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct____iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_9_kbest_trees"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct____iter__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct____iter__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct____iter__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -25459,24 +23474,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_9_kbest_trees, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_9_kbest_trees, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_9_kbest_trees, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_9_kbest_trees, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct____iter__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct____iter__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct____iter__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -25486,7 +23501,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct____iter__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -25500,165 +23515,81 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o);
-  p->__pyx_v_fmap = 0;
+static struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *__pyx_freelist_5_cdec___pyx_scope_struct_21___iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_21___iter__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_21___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_21___iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_21___iter__[--__pyx_freecount_5_cdec___pyx_scope_struct_21___iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o);
+  p->__pyx_v_i = 0;
   p->__pyx_v_self = 0;
-  p->__pyx_v_size = 0;
+  p->__pyx_t_1 = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_21___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_fmap);
+  Py_CLEAR(p->__pyx_v_i);
   Py_CLEAR(p->__pyx_v_self);
-  Py_CLEAR(p->__pyx_v_size);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_t_1);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_21___iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_21___iter__[__pyx_freecount_5_cdec___pyx_scope_struct_21___iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_21___iter__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
-  if (p->__pyx_v_fmap) {
-    e = (*v)(((PyObject*)p->__pyx_v_fmap), a); if (e) return e;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
+  if (p->__pyx_v_i) {
+    e = (*v)(p->__pyx_v_i, a); if (e) return e;
   }
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
-  if (p->__pyx_v_size) {
-    e = (*v)(p->__pyx_v_size, a); if (e) return e;
+  if (p->__pyx_t_1) {
+    e = (*v)(p->__pyx_t_1, a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_21___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_fmap);
-  p->__pyx_v_fmap = ((struct __pyx_obj_5_cdec_SparseVector *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_v_i);
+  p->__pyx_v_i = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_SufficientStats *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_size);
-  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->__pyx_t_1);
+  p->__pyx_t_1 = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_10_kbest_features[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_21___iter__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_10_kbest_features = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_10_kbest_features = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_10_kbest_features = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_10_kbest_features = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_10_kbest_features = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_21___iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_10_kbest_features"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_21___iter__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_21___iter__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -25668,24 +23599,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_10_kbest_features = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_10_kbest_features, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_10_kbest_features, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_10_kbest_features, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_10_kbest_features, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_21___iter__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_21___iter__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_21___iter__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -25695,7 +23626,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_10_kbest_features = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_21___iter__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -25709,108 +23640,55 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_10_kbest_features = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_11_sample(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o);
-  p->__pyx_v_self = 0;
+static PyObject *__pyx_tp_new_5_cdec_DenseVector(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_11_sample(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_DenseVector(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_11DenseVector_3__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
-
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_11_sample(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
-  }
-  return 0;
+static PyObject *__pyx_sq_item_5_cdec_DenseVector(PyObject *o, Py_ssize_t i) {
+  PyObject *r;
+  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
+  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
+  Py_DECREF(x);
+  return r;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_11_sample(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
+static int __pyx_mp_ass_subscript_5_cdec_DenseVector(PyObject *o, PyObject *i, PyObject *v) {
+  if (v) {
+    return __pyx_pw_5_cdec_11DenseVector_9__setitem__(o, i, v);
+  }
+  else {
+    PyErr_Format(PyExc_NotImplementedError,
+      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
+    return -1;
+  }
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_11_sample[] = {
+static PyMethodDef __pyx_methods_5_cdec_DenseVector[] = {
+  {__Pyx_NAMESTR("dot"), (PyCFunction)__pyx_pw_5_cdec_11DenseVector_14dot, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_11DenseVector_13dot)},
+  {__Pyx_NAMESTR("tosparse"), (PyCFunction)__pyx_pw_5_cdec_11DenseVector_16tosparse, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_11DenseVector_15tosparse)},
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_11_sample = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_11_sample = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_DenseVector = {
+  __pyx_pw_5_cdec_11DenseVector_5__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
-  0, /*sq_item*/
+  __pyx_sq_item_5_cdec_DenseVector, /*sq_item*/
   0, /*sq_slice*/
   0, /*sq_ass_item*/
   0, /*sq_ass_slice*/
@@ -25819,39 +23697,18 @@ static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_11_sample = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_11_sample = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_11_sample = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMappingMethods __pyx_tp_as_mapping_DenseVector = {
+  __pyx_pw_5_cdec_11DenseVector_5__len__, /*mp_length*/
+  __pyx_pw_5_cdec_11DenseVector_7__getitem__, /*mp_subscript*/
+  __pyx_mp_ass_subscript_5_cdec_DenseVector, /*mp_ass_subscript*/
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_11_sample = {
+static PyTypeObject __pyx_type_5_cdec_DenseVector = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_11_sample"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.DenseVector"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_DenseVector), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_11_sample, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_DenseVector, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -25861,24 +23718,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_11_sample = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_11_sample, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_11_sample, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_11_sample, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  &__pyx_tp_as_sequence_DenseVector, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_DenseVector, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_11_sample, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_11_sample, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_11_sample, /*tp_clear*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_11DenseVector_11__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_11_sample, /*tp_methods*/
+  __pyx_methods_5_cdec_DenseVector, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -25886,9 +23743,9 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_11_sample = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_11DenseVector_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_11_sample, /*tp_new*/
+  __pyx_tp_new_5_cdec_DenseVector, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -25902,149 +23759,73 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_11_sample = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *__pyx_freelist_5_cdec___pyx_scope_struct_7___iter__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_7___iter__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_7___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_7___iter__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_7___iter__[--__pyx_freecount_5_cdec___pyx_scope_struct_7___iter__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o);
   p->__pyx_v_self = 0;
+  p->__pyx_v_trule = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_7___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_trule);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_7___iter__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_7___iter__[__pyx_freecount_5_cdec___pyx_scope_struct_7___iter__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_7___iter__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
+  if (p->__pyx_v_trule) {
+    e = (*v)(((PyObject*)p->__pyx_v_trule), a); if (e) return e;
+  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_12_sample_trees(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_7___iter__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__ *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Grammar *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_trule);
+  p->__pyx_v_trule = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_12_sample_trees[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_7___iter__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_12_sample_trees = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_12_sample_trees = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_12_sample_trees = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_12_sample_trees = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_12_sample_trees = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_7___iter__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_12_sample_trees"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_12_sample_trees), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_7___iter__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_7___iter__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_7___iter__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -26054,24 +23835,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_12_sample_trees = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_12_sample_trees, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_12_sample_trees, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_12_sample_trees, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_12_sample_trees, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_7___iter__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_7___iter__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_7___iter__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -26081,7 +23862,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_12_sample_trees = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_12_sample_trees, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_7___iter__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -26095,149 +23876,56 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_12_sample_trees = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_13___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o);
-  p->__pyx_v_self = 0;
+static PyObject *__pyx_tp_new_5_cdec_Metric(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_Metric *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_Metric *)o);
+  p->scorer = ((struct __pyx_obj_5_cdec_Scorer *)Py_None); Py_INCREF(Py_None);
+  if (unlikely(__pyx_pw_5_cdec_6Metric_1__cinit__(o, __pyx_empty_tuple, NULL) < 0)) {
+    Py_DECREF(o); o = 0;
+  }
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_13___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
+static void __pyx_tp_dealloc_5_cdec_Metric(PyObject *o) {
+  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
   PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
+  Py_CLEAR(p->scorer);
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_13___get__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec_Metric(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
+  if (p->scorer) {
+    e = (*v)(((PyObject*)p->scorer), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_13___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__ *)o;
+static int __pyx_tp_clear_5_cdec_Metric(PyObject *o) {
+  struct __pyx_obj_5_cdec_Metric *p = (struct __pyx_obj_5_cdec_Metric *)o;
   PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  tmp = ((PyObject*)p->scorer);
+  p->scorer = ((struct __pyx_obj_5_cdec_Scorer *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_13___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec_Metric[] = {
+  {__Pyx_NAMESTR("score"), (PyCFunction)__pyx_pw_5_cdec_6Metric_5score, METH_NOARGS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("evaluate"), (PyCFunction)__pyx_pw_5_cdec_6Metric_7evaluate, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(0)},
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_13___get__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_13___get__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_13___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_13___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_13___get__ = {
+static PyTypeObject __pyx_type_5_cdec_Metric = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_13___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_13___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Metric"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Metric), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_13___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Metric, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -26247,24 +23935,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_13___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_13___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_13___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_13___get__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
-  0, /*tp_call*/
+  __pyx_pw_5_cdec_6Metric_3__call__, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_13___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_13___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_13___get__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec_Metric, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec_Metric, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_13___get__, /*tp_methods*/
+  __pyx_methods_5_cdec_Metric, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -26274,7 +23962,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_13___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_13___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec_Metric, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -26288,47 +23976,53 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_13___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_14___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o);
-  p->__pyx_v_self = 0;
+static PyObject *__pyx_tp_new_5_cdec_SufficientStats(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_14___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_SufficientStats(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_15SufficientStats_1__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
+static PyObject *__pyx_sq_item_5_cdec_SufficientStats(PyObject *o, Py_ssize_t i) {
+  PyObject *r;
+  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
+  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
+  Py_DECREF(x);
+  return r;
+}
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_14___get__(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
-  }
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_15SufficientStats_score(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_15SufficientStats_5score_1__get__(o);
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_14___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__ *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_15SufficientStats_detail(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_15SufficientStats_6detail_1__get__(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_14___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec_SufficientStats[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_14___get__ = {
-  0, /*nb_add*/
+static struct PyGetSetDef __pyx_getsets_5_cdec_SufficientStats[] = {
+  {(char *)"score", __pyx_getprop_5_cdec_15SufficientStats_score, 0, 0, 0},
+  {(char *)"detail", __pyx_getprop_5_cdec_15SufficientStats_detail, 0, 0, 0},
+  {0, 0, 0, 0, 0}
+};
+
+static PyNumberMethods __pyx_tp_as_number_SufficientStats = {
+  __pyx_pw_5_cdec_15SufficientStats_12__add__, /*nb_add*/
   0, /*nb_subtract*/
   0, /*nb_multiply*/
   #if PY_MAJOR_VERSION < 3
@@ -26363,7 +24057,7 @@ static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_14___get__ = {
   #if PY_MAJOR_VERSION < 3
   0, /*nb_hex*/
   #endif
-  0, /*nb_inplace_add*/
+  __pyx_pw_5_cdec_15SufficientStats_10__iadd__, /*nb_inplace_add*/
   0, /*nb_inplace_subtract*/
   0, /*nb_inplace_multiply*/
   #if PY_MAJOR_VERSION < 3
@@ -26385,11 +24079,11 @@ static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_14___get__ = {
   #endif
 };
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_14___get__ = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_SufficientStats = {
+  __pyx_pw_5_cdec_15SufficientStats_3__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
-  0, /*sq_item*/
+  __pyx_sq_item_5_cdec_SufficientStats, /*sq_item*/
   0, /*sq_slice*/
   0, /*sq_ass_item*/
   0, /*sq_ass_slice*/
@@ -26398,39 +24092,18 @@ static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_14___get__ = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_14___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
+static PyMappingMethods __pyx_tp_as_mapping_SufficientStats = {
+  __pyx_pw_5_cdec_15SufficientStats_3__len__, /*mp_length*/
+  __pyx_pw_5_cdec_15SufficientStats_8__getitem__, /*mp_subscript*/
   0, /*mp_ass_subscript*/
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_14___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_14___get__ = {
+static PyTypeObject __pyx_type_5_cdec_SufficientStats = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_14___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_14___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.SufficientStats"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_SufficientStats), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_14___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_SufficientStats, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -26440,26 +24113,26 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_14___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_14___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_14___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_14___get__, /*tp_as_mapping*/
+  &__pyx_tp_as_number_SufficientStats, /*tp_as_number*/
+  &__pyx_tp_as_sequence_SufficientStats, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_SufficientStats, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_14___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_14___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_14___get__, /*tp_clear*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_15SufficientStats_5__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_14___get__, /*tp_methods*/
+  __pyx_methods_5_cdec_SufficientStats, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_SufficientStats, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -26467,7 +24140,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_14___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_14___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec_SufficientStats, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -26481,149 +24154,73 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_14___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_15___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *__pyx_freelist_5_cdec___pyx_scope_struct_8_kbest[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_8_kbest = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_8_kbest > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_8_kbest[--__pyx_freecount_5_cdec___pyx_scope_struct_8_kbest];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o);
   p->__pyx_v_self = 0;
+  p->__pyx_v_size = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_15___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_8_kbest(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_size);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_8_kbest < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_8_kbest[__pyx_freecount_5_cdec___pyx_scope_struct_8_kbest++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_15___get__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_8_kbest(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
+  if (p->__pyx_v_size) {
+    e = (*v)(p->__pyx_v_size, a); if (e) return e;
+  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_15___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_8_kbest(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphEdge *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_size);
+  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_15___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_8_kbest[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_15___get__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_15___get__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_15___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_15___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_15___get__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_8_kbest = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_15___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_8_kbest"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_8_kbest), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_15___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_8_kbest, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -26633,24 +24230,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_15___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_15___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_15___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_15___get__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_15___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_15___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_15___get__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_8_kbest, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_8_kbest, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_15___get__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_8_kbest, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -26660,7 +24257,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_15___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_15___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_8_kbest, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -26674,149 +24271,81 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_15___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_16___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *__pyx_freelist_5_cdec___pyx_scope_struct_10_kbest_features[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_10_kbest_features = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_10_kbest_features > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_10_kbest_features[--__pyx_freecount_5_cdec___pyx_scope_struct_10_kbest_features];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o);
+  p->__pyx_v_fmap = 0;
   p->__pyx_v_self = 0;
+  p->__pyx_v_size = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_16___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
   PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_fmap);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_size);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_10_kbest_features < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_10_kbest_features[__pyx_freecount_5_cdec___pyx_scope_struct_10_kbest_features++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_16___get__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
+  if (p->__pyx_v_fmap) {
+    e = (*v)(((PyObject*)p->__pyx_v_fmap), a); if (e) return e;
+  }
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
+  if (p->__pyx_v_size) {
+    e = (*v)(p->__pyx_v_size, a); if (e) return e;
+  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_16___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_10_kbest_features(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features *)o;
   PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_fmap);
+  p->__pyx_v_fmap = ((struct __pyx_obj_5_cdec_SparseVector *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphNode *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_size);
+  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_16___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_10_kbest_features[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_16___get__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_16___get__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_16___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_16___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_16___get__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_10_kbest_features = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_16___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_16___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_10_kbest_features"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_10_kbest_features), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_16___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -26826,24 +24355,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_16___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_16___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_16___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_16___get__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_16___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_16___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_16___get__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_16___get__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -26853,7 +24382,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_16___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_16___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_10_kbest_features, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -26867,149 +24396,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_16___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_17___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *__pyx_freelist_5_cdec___pyx_scope_struct_15___get__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_15___get__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_15___get__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_15___get__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_15___get__[--__pyx_freecount_5_cdec___pyx_scope_struct_15___get__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o);
   p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_17___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_15___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_15___get__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_15___get__[__pyx_freecount_5_cdec___pyx_scope_struct_15___get__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_17___get__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_15___get__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_17___get__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_15___get__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__ *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphNode *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_HypergraphEdge *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_17___get__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_15___get__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_17___get__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_17___get__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_17___get__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_17___get__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_17___get__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_15___get__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_17___get__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_17___get__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_15___get__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_15___get__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_17___get__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_15___get__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -27019,24 +24464,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_17___get__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_17___get__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_17___get__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_17___get__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_17___get__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_17___get__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_17___get__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_15___get__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_15___get__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_17___get__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_15___get__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -27046,7 +24491,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_17___get__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_17___get__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_15___get__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -27060,149 +24505,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_17___get__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *__pyx_freelist_5_cdec___pyx_scope_struct_5___str__[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_5___str__ = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_5___str__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_5___str__ > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_5___str__[--__pyx_freecount_5_cdec___pyx_scope_struct_5___str__];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o);
   p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_18___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_5___str__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_5___str__ < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_5___str__[__pyx_freecount_5_cdec___pyx_scope_struct_5___str__++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_18___iter__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_5___str__(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_18___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_5___str__(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__ *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Lattice *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_TRule *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_18___iter__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_5___str__[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_18___iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_18___iter__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_18___iter__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_18___iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_18___iter__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_5___str__ = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_18___iter__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_18___iter__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_5___str__"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_5___str__), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_18___iter__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_5___str__, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -27212,24 +24573,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_18___iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_18___iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_18___iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_18___iter__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_18___iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_18___iter__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_18___iter__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_5___str__, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_5___str__, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_18___iter__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_5___str__, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -27239,7 +24600,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_18___iter__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_18___iter__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_5___str__, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -27253,149 +24614,89 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_18___iter__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_19_todot(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *__pyx_freelist_5_cdec___pyx_scope_struct_9_kbest_trees[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_9_kbest_trees = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_9_kbest_trees > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_9_kbest_trees[--__pyx_freecount_5_cdec___pyx_scope_struct_9_kbest_trees];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o);
+  p->__pyx_v_e_tree = 0;
+  p->__pyx_v_f_tree = 0;
   p->__pyx_v_self = 0;
+  p->__pyx_v_size = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_19_todot(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
   PyObject_GC_UnTrack(o);
+  Py_CLEAR(p->__pyx_v_e_tree);
+  Py_CLEAR(p->__pyx_v_f_tree);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  Py_CLEAR(p->__pyx_v_size);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_9_kbest_trees < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_9_kbest_trees[__pyx_freecount_5_cdec___pyx_scope_struct_9_kbest_trees++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_19_todot(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
+  if (p->__pyx_v_e_tree) {
+    e = (*v)(p->__pyx_v_e_tree, a); if (e) return e;
+  }
+  if (p->__pyx_v_f_tree) {
+    e = (*v)(p->__pyx_v_f_tree, a); if (e) return e;
+  }
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
+  if (p->__pyx_v_size) {
+    e = (*v)(p->__pyx_v_size, a); if (e) return e;
+  }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_19_todot(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_9_kbest_trees(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees *)o;
   PyObject* tmp;
+  tmp = ((PyObject*)p->__pyx_v_e_tree);
+  p->__pyx_v_e_tree = ((PyObject*)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_f_tree);
+  p->__pyx_v_f_tree = ((PyObject*)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Lattice *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
+  Py_XDECREF(tmp);
+  tmp = ((PyObject*)p->__pyx_v_size);
+  p->__pyx_v_size = Py_None; Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_19_todot[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_9_kbest_trees[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_19_todot = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_19_todot = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_19_todot = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_19_todot = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_19_todot = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_19_todot"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_9_kbest_trees"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_9_kbest_trees), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_19_todot, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -27405,24 +24706,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_19_todot = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_19_todot, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_19_todot, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_19_todot, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_19_todot, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_19_todot, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_19_todot, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_19_todot, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -27432,7 +24733,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_19_todot = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_19_todot, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_9_kbest_trees, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -27445,198 +24746,81 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_19_todot = {
   0, /*tp_version_tag*/
   #endif
 };
+static struct __pyx_vtabstruct_5_cdec_Hypergraph __pyx_vtable_5_cdec_Hypergraph;
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_20_lines(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o);
-  p->__pyx_outer_scope = 0;
-  p->__pyx_v_delta = 0;
-  p->__pyx_v_i = 0;
-  p->__pyx_v_label = 0;
-  p->__pyx_v_weight = 0;
-  p->__pyx_t_1 = 0;
-  p->__pyx_t_3 = 0;
+static PyObject *__pyx_tp_new_5_cdec_Hypergraph(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec_Hypergraph *p;
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_5_cdec_Hypergraph *)o);
+  p->__pyx_vtab = __pyx_vtabptr_5_cdec_Hypergraph;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_20_lines(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_outer_scope);
-  Py_CLEAR(p->__pyx_v_delta);
-  Py_CLEAR(p->__pyx_v_i);
-  Py_CLEAR(p->__pyx_v_label);
-  Py_CLEAR(p->__pyx_v_weight);
-  Py_CLEAR(p->__pyx_t_1);
-  Py_CLEAR(p->__pyx_t_3);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_Hypergraph(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_10Hypergraph_1__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_20_lines(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
-  if (p->__pyx_outer_scope) {
-    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
-  }
-  if (p->__pyx_v_delta) {
-    e = (*v)(p->__pyx_v_delta, a); if (e) return e;
-  }
-  if (p->__pyx_v_i) {
-    e = (*v)(p->__pyx_v_i, a); if (e) return e;
-  }
-  if (p->__pyx_v_label) {
-    e = (*v)(p->__pyx_v_label, a); if (e) return e;
-  }
-  if (p->__pyx_v_weight) {
-    e = (*v)(p->__pyx_v_weight, a); if (e) return e;
-  }
-  if (p->__pyx_t_1) {
-    e = (*v)(p->__pyx_t_1, a); if (e) return e;
-  }
-  if (p->__pyx_t_3) {
-    e = (*v)(p->__pyx_t_3, a); if (e) return e;
-  }
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_10Hypergraph_edges(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_10Hypergraph_5edges_1__get__(o);
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_20_lines(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_outer_scope);
-  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_19_todot *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_delta);
-  p->__pyx_v_delta = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_i);
-  p->__pyx_v_i = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_label);
-  p->__pyx_v_label = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_weight);
-  p->__pyx_v_weight = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_1);
-  p->__pyx_t_1 = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_3);
-  p->__pyx_t_3 = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
+static PyObject *__pyx_getprop_5_cdec_10Hypergraph_nodes(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_10Hypergraph_5nodes_1__get__(o);
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_20_lines[] = {
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_20_lines = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
+static PyObject *__pyx_getprop_5_cdec_10Hypergraph_goal(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_10Hypergraph_4goal_1__get__(o);
+}
 
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_20_lines = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
+static PyObject *__pyx_getprop_5_cdec_10Hypergraph_npaths(PyObject *o, CYTHON_UNUSED void *x) {
+  return __pyx_pw_5_cdec_10Hypergraph_6npaths_1__get__(o);
+}
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_20_lines = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
+static PyMethodDef __pyx_methods_5_cdec_Hypergraph[] = {
+  {__Pyx_NAMESTR("viterbi"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_3viterbi, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_2viterbi)},
+  {__Pyx_NAMESTR("viterbi_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_5viterbi_trees, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_4viterbi_trees)},
+  {__Pyx_NAMESTR("viterbi_features"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_7viterbi_features, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_6viterbi_features)},
+  {__Pyx_NAMESTR("viterbi_forest"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_9viterbi_forest, METH_NOARGS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("viterbi_joshua"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_11viterbi_joshua, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_10viterbi_joshua)},
+  {__Pyx_NAMESTR("kbest"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_13kbest, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_12kbest)},
+  {__Pyx_NAMESTR("kbest_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_16kbest_trees, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_15kbest_trees)},
+  {__Pyx_NAMESTR("kbest_features"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_19kbest_features, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_18kbest_features)},
+  {__Pyx_NAMESTR("sample"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_22sample, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_21sample)},
+  {__Pyx_NAMESTR("sample_trees"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_25sample_trees, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_24sample_trees)},
+  {__Pyx_NAMESTR("intersect"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_28intersect, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_27intersect)},
+  {__Pyx_NAMESTR("prune"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_30prune, METH_VARARGS|METH_KEYWORDS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_29prune)},
+  {__Pyx_NAMESTR("lattice"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_32lattice, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_31lattice)},
+  {__Pyx_NAMESTR("plf"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_34plf, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_33plf)},
+  {__Pyx_NAMESTR("reweight"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_36reweight, METH_O, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_35reweight)},
+  {__Pyx_NAMESTR("inside_outside"), (PyCFunction)__pyx_pw_5_cdec_10Hypergraph_38inside_outside, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_10Hypergraph_37inside_outside)},
+  {0, 0, 0, 0}
 };
 
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_20_lines = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static struct PyGetSetDef __pyx_getsets_5_cdec_Hypergraph[] = {
+  {(char *)"edges", __pyx_getprop_5_cdec_10Hypergraph_edges, 0, 0, 0},
+  {(char *)"nodes", __pyx_getprop_5_cdec_10Hypergraph_nodes, 0, 0, 0},
+  {(char *)"goal", __pyx_getprop_5_cdec_10Hypergraph_goal, 0, 0, 0},
+  {(char *)"npaths", __pyx_getprop_5_cdec_10Hypergraph_npaths, 0, 0, 0},
+  {0, 0, 0, 0, 0}
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_20_lines = {
+static PyTypeObject __pyx_type_5_cdec_Hypergraph = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_20_lines"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_20_lines), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Hypergraph"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Hypergraph), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_20_lines, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Hypergraph, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -27646,26 +24830,26 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_20_lines = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_20_lines, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_20_lines, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_20_lines, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_20_lines, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_20_lines, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_20_lines, /*tp_clear*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_20_lines, /*tp_methods*/
+  __pyx_methods_5_cdec_Hypergraph, /*tp_methods*/
   0, /*tp_members*/
-  0, /*tp_getset*/
+  __pyx_getsets_5_cdec_Hypergraph, /*tp_getset*/
   0, /*tp_base*/
   0, /*tp_dict*/
   0, /*tp_descr_get*/
@@ -27673,7 +24857,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_20_lines = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_20_lines, /*tp_new*/
+  __pyx_tp_new_5_cdec_Hypergraph, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -27687,124 +24871,59 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_20_lines = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_21___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o);
-  p->__pyx_v_i = 0;
-  p->__pyx_v_self = 0;
-  p->__pyx_t_1 = 0;
+static PyObject *__pyx_tp_new_5_cdec_Lattice(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  PyObject *o;
+  o = (*t->tp_alloc)(t, 0);
+  if (unlikely(!o)) return 0;
+  if (unlikely(__pyx_pw_5_cdec_7Lattice_1__cinit__(o, __pyx_empty_tuple, NULL) < 0)) {
+    Py_DECREF(o); o = 0;
+  }
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_21___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_i);
-  Py_CLEAR(p->__pyx_v_self);
-  Py_CLEAR(p->__pyx_t_1);
-  PyObject_GC_Track(o);
+static void __pyx_tp_dealloc_5_cdec_Lattice(PyObject *o) {
+  {
+    PyObject *etype, *eval, *etb;
+    PyErr_Fetch(&etype, &eval, &etb);
+    ++Py_REFCNT(o);
+    __pyx_pw_5_cdec_7Lattice_5__dealloc__(o);
+    if (PyErr_Occurred()) PyErr_WriteUnraisable(o);
+    --Py_REFCNT(o);
+    PyErr_Restore(etype, eval, etb);
+  }
   (*Py_TYPE(o)->tp_free)(o);
 }
+static PyObject *__pyx_sq_item_5_cdec_Lattice(PyObject *o, Py_ssize_t i) {
+  PyObject *r;
+  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
+  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
+  Py_DECREF(x);
+  return r;
+}
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_21___iter__(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
-  if (p->__pyx_v_i) {
-    e = (*v)(p->__pyx_v_i, a); if (e) return e;
-  }
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
+static int __pyx_mp_ass_subscript_5_cdec_Lattice(PyObject *o, PyObject *i, PyObject *v) {
+  if (v) {
+    return __pyx_pw_5_cdec_7Lattice_9__setitem__(o, i, v);
   }
-  if (p->__pyx_t_1) {
-    e = (*v)(p->__pyx_t_1, a); if (e) return e;
+  else {
+    PyErr_Format(PyExc_NotImplementedError,
+      "Subscript deletion not supported by %s", Py_TYPE(o)->tp_name);
+    return -1;
   }
-  return 0;
-}
-
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_21___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__ *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_i);
-  p->__pyx_v_i = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_SufficientStats *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_1);
-  p->__pyx_t_1 = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_21___iter__[] = {
+static PyMethodDef __pyx_methods_5_cdec_Lattice[] = {
+  {__Pyx_NAMESTR("__unicode__"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_15__unicode__, METH_NOARGS, __Pyx_DOCSTR(0)},
+  {__Pyx_NAMESTR("todot"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_20todot, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Lattice_19todot)},
+  {__Pyx_NAMESTR("as_hypergraph"), (PyCFunction)__pyx_pw_5_cdec_7Lattice_22as_hypergraph, METH_NOARGS, __Pyx_DOCSTR(__pyx_doc_5_cdec_7Lattice_21as_hypergraph)},
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_21___iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_21___iter__ = {
-  0, /*sq_length*/
+static PySequenceMethods __pyx_tp_as_sequence_Lattice = {
+  __pyx_pw_5_cdec_7Lattice_11__len__, /*sq_length*/
   0, /*sq_concat*/
   0, /*sq_repeat*/
-  0, /*sq_item*/
+  __pyx_sq_item_5_cdec_Lattice, /*sq_item*/
   0, /*sq_slice*/
   0, /*sq_ass_item*/
   0, /*sq_ass_slice*/
@@ -27813,39 +24932,18 @@ static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_21___iter__ = {
   0, /*sq_inplace_repeat*/
 };
 
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_21___iter__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_21___iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
+static PyMappingMethods __pyx_tp_as_mapping_Lattice = {
+  __pyx_pw_5_cdec_7Lattice_11__len__, /*mp_length*/
+  __pyx_pw_5_cdec_7Lattice_7__getitem__, /*mp_subscript*/
+  __pyx_mp_ass_subscript_5_cdec_Lattice, /*mp_ass_subscript*/
 };
 
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_21___iter__ = {
+static PyTypeObject __pyx_type_5_cdec_Lattice = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_21___iter__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_21___iter__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.Lattice"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_Lattice), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_21___iter__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Lattice, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -27855,24 +24953,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_21___iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_21___iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_21___iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_21___iter__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  &__pyx_tp_as_sequence_Lattice, /*tp_as_sequence*/
+  &__pyx_tp_as_mapping_Lattice, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
-  0, /*tp_str*/
+  __pyx_pw_5_cdec_7Lattice_13__str__, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_21___iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_21___iter__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_21___iter__, /*tp_clear*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
+  __pyx_pw_5_cdec_7Lattice_17__iter__, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_21___iter__, /*tp_methods*/
+  __pyx_methods_5_cdec_Lattice, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -27880,9 +24978,9 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_21___iter__ = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_7Lattice_3__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_21___iter__, /*tp_new*/
+  __pyx_tp_new_5_cdec_Lattice, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -27896,149 +24994,65 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_21___iter__ = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o);
+static struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *__pyx_freelist_5_cdec___pyx_scope_struct_11_sample[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_11_sample = 0;
+
+static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_11_sample(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_11_sample > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_11_sample[--__pyx_freecount_5_cdec___pyx_scope_struct_11_sample];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
+  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o);
   p->__pyx_v_self = 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_22___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
+static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_11_sample(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
   PyObject_GC_UnTrack(o);
   Py_CLEAR(p->__pyx_v_self);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_11_sample < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_11_sample[__pyx_freecount_5_cdec___pyx_scope_struct_11_sample++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_22___iter__(PyObject *o, visitproc v, void *a) {
+static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_11_sample(PyObject *o, visitproc v, void *a) {
   int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
+  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
   if (p->__pyx_v_self) {
     e = (*v)(((PyObject*)p->__pyx_v_self), a); if (e) return e;
   }
   return 0;
 }
 
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_22___iter__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__ *)o;
+static int __pyx_tp_clear_5_cdec___pyx_scope_struct_11_sample(PyObject *o) {
+  struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample *)o;
   PyObject* tmp;
   tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_CandidateSet *)Py_None); Py_INCREF(Py_None);
+  p->__pyx_v_self = ((struct __pyx_obj_5_cdec_Hypergraph *)Py_None); Py_INCREF(Py_None);
   Py_XDECREF(tmp);
   return 0;
 }
 
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_22___iter__[] = {
+static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_11_sample[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_22___iter__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_22___iter__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_22___iter__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_22___iter__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_22___iter__ = {
+static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_11_sample = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_22___iter__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_22___iter__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_11_sample"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_11_sample), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_22___iter__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_11_sample, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -28048,24 +25062,24 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_22___iter__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_22___iter__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_22___iter__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_22___iter__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_22___iter__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_22___iter__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_22___iter__, /*tp_clear*/
+  __pyx_tp_traverse_5_cdec___pyx_scope_struct_11_sample, /*tp_traverse*/
+  __pyx_tp_clear_5_cdec___pyx_scope_struct_11_sample, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_22___iter__, /*tp_methods*/
+  __pyx_methods_5_cdec___pyx_scope_struct_11_sample, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -28075,7 +25089,7 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_22___iter__ = {
   0, /*tp_dictoffset*/
   0, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_22___iter__, /*tp_new*/
+  __pyx_tp_new_5_cdec___pyx_scope_struct_11_sample, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -28089,10 +25103,21 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_22___iter__ = {
   #endif
 };
 
+static struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config *__pyx_freelist_5_cdec___pyx_scope_struct_23__make_config[8];
+static int __pyx_freecount_5_cdec___pyx_scope_struct_23__make_config = 0;
+
 static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_23__make_config(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
   struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
+  PyObject *o;
+  if (likely((__pyx_freecount_5_cdec___pyx_scope_struct_23__make_config > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config)))) {
+    o = (PyObject*)__pyx_freelist_5_cdec___pyx_scope_struct_23__make_config[--__pyx_freecount_5_cdec___pyx_scope_struct_23__make_config];
+    memset(o, 0, sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config));
+    PyObject_INIT(o, t);
+    PyObject_GC_Track(o);
+  } else {
+    o = (*t->tp_alloc)(t, 0);
+    if (unlikely(!o)) return 0;
+  }
   p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config *)o);
   p->__pyx_v_config = 0;
   p->__pyx_v_info = 0;
@@ -28114,8 +25139,11 @@ static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_23__make_config(PyObject
   Py_CLEAR(p->__pyx_v_value);
   Py_CLEAR(p->__pyx_t_0);
   Py_CLEAR(p->__pyx_t_1);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
+  if ((__pyx_freecount_5_cdec___pyx_scope_struct_23__make_config < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config))) {
+    __pyx_freelist_5_cdec___pyx_scope_struct_23__make_config[__pyx_freecount_5_cdec___pyx_scope_struct_23__make_config++] = ((struct __pyx_obj_5_cdec___pyx_scope_struct_23__make_config *)o);
+  } else {
+    (*Py_TYPE(o)->tp_free)(o);
+  }
 }
 
 static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_23__make_config(PyObject *o, visitproc v, void *a) {
@@ -28176,104 +25204,6 @@ static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_23__make_config[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_23__make_config = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_23__make_config = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_23__make_config = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_23__make_config = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
 static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_23__make_config = {
   PyVarObject_HEAD_INIT(0, 0)
   __Pyx_NAMESTR("_cdec.__pyx_scope_struct_23__make_config"), /*tp_name*/
@@ -28289,16 +25219,16 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_23__make_config = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_23__make_config, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_23__make_config, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_23__make_config, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_23__make_config, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
   0, /*tp_doc*/
   __pyx_tp_traverse_5_cdec___pyx_scope_struct_23__make_config, /*tp_traverse*/
   __pyx_tp_clear_5_cdec___pyx_scope_struct_23__make_config, /*tp_clear*/
@@ -28330,149 +25260,22 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_23__make_config = {
   #endif
 };
 
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_24___init__(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o);
-  p->__pyx_v_config = 0;
+static PyObject *__pyx_tp_new_5_cdec_TextGrammar(PyTypeObject *t, PyObject *a, PyObject *k) {
+  PyObject *o = __pyx_tp_new_5_cdec_Grammar(t, a, k);
+  if (unlikely(!o)) return 0;
   return o;
 }
 
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_24___init__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_config);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_24___init__(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
-  if (p->__pyx_v_config) {
-    e = (*v)(p->__pyx_v_config, a); if (e) return e;
-  }
-  return 0;
-}
-
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_24___init__(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_v_config);
-  p->__pyx_v_config = ((PyObject*)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_24___init__[] = {
+static PyMethodDef __pyx_methods_5_cdec_TextGrammar[] = {
   {0, 0, 0, 0}
 };
 
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_24___init__ = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_24___init__ = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_24___init__ = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_24___init__ = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_24___init__ = {
+static PyTypeObject __pyx_type_5_cdec_TextGrammar = {
   PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_24___init__"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__), /*tp_basicsize*/
+  __Pyx_NAMESTR("_cdec.TextGrammar"), /*tp_name*/
+  sizeof(struct __pyx_obj_5_cdec_TextGrammar), /*tp_basicsize*/
   0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_24___init__, /*tp_dealloc*/
+  __pyx_tp_dealloc_5_cdec_Grammar, /*tp_dealloc*/
   0, /*tp_print*/
   0, /*tp_getattr*/
   0, /*tp_setattr*/
@@ -28482,233 +25285,28 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_24___init__ = {
   0, /*reserved*/
   #endif
   0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_24___init__, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_24___init__, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_24___init__, /*tp_as_mapping*/
+  0, /*tp_as_number*/
+  0, /*tp_as_sequence*/
+  0, /*tp_as_mapping*/
   0, /*tp_hash*/
   0, /*tp_call*/
   0, /*tp_str*/
   0, /*tp_getattro*/
   0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_24___init__, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
+  0, /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
   0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_24___init__, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_24___init__, /*tp_clear*/
+  0, /*tp_traverse*/
+  0, /*tp_clear*/
   0, /*tp_richcompare*/
   0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
-  0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_24___init__, /*tp_methods*/
-  0, /*tp_members*/
-  0, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  0, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_24___init__, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*tp_version_tag*/
-  #endif
-};
-
-static PyObject *__pyx_tp_new_5_cdec___pyx_scope_struct_25_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p;
-  PyObject *o = (*t->tp_alloc)(t, 0);
-  if (!o) return 0;
-  p = ((struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o);
-  p->__pyx_outer_scope = 0;
-  p->__pyx_v_kv = 0;
-  p->__pyx_t_0 = 0;
-  return o;
-}
-
-static void __pyx_tp_dealloc_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_outer_scope);
-  Py_CLEAR(p->__pyx_v_kv);
-  Py_CLEAR(p->__pyx_t_0);
-  PyObject_GC_Track(o);
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static int __pyx_tp_traverse_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
-  if (p->__pyx_outer_scope) {
-    e = (*v)(((PyObject*)p->__pyx_outer_scope), a); if (e) return e;
-  }
-  if (p->__pyx_v_kv) {
-    e = (*v)(p->__pyx_v_kv, a); if (e) return e;
-  }
-  if (p->__pyx_t_0) {
-    e = (*v)(p->__pyx_t_0, a); if (e) return e;
-  }
-  return 0;
-}
-
-static int __pyx_tp_clear_5_cdec___pyx_scope_struct_25_genexpr(PyObject *o) {
-  struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *p = (struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr *)o;
-  PyObject* tmp;
-  tmp = ((PyObject*)p->__pyx_outer_scope);
-  p->__pyx_outer_scope = ((struct __pyx_obj_5_cdec___pyx_scope_struct_24___init__ *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_v_kv);
-  p->__pyx_v_kv = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  tmp = ((PyObject*)p->__pyx_t_0);
-  p->__pyx_t_0 = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-
-static PyMethodDef __pyx_methods_5_cdec___pyx_scope_struct_25_genexpr[] = {
-  {0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number___pyx_scope_struct_25_genexpr = {
-  0, /*nb_add*/
-  0, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  0, /*nb_and*/
-  0, /*nb_xor*/
-  0, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  0, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  0, /*nb_inplace_and*/
-  0, /*nb_inplace_xor*/
-  0, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  #if PY_VERSION_HEX >= 0x02050000
-  0, /*nb_index*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence___pyx_scope_struct_25_genexpr = {
-  0, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  0, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  0, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping___pyx_scope_struct_25_genexpr = {
-  0, /*mp_length*/
-  0, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyBufferProcs __pyx_tp_as_buffer___pyx_scope_struct_25_genexpr = {
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getreadbuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getwritebuffer*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getsegcount*/
-  #endif
-  #if PY_MAJOR_VERSION < 3
-  0, /*bf_getcharbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_getbuffer*/
-  #endif
-  #if PY_VERSION_HEX >= 0x02060000
-  0, /*bf_releasebuffer*/
-  #endif
-};
-
-static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_25_genexpr = {
-  PyVarObject_HEAD_INIT(0, 0)
-  __Pyx_NAMESTR("_cdec.__pyx_scope_struct_25_genexpr"), /*tp_name*/
-  sizeof(struct __pyx_obj_5_cdec___pyx_scope_struct_25_genexpr), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_5_cdec___pyx_scope_struct_25_genexpr, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
+  #if CYTHON_COMPILING_IN_PYPY
+  __pyx_pw_5_cdec_7Grammar_3__iter__, /*tp_iter*/
   #else
-  0, /*reserved*/
-  #endif
-  0, /*tp_repr*/
-  &__pyx_tp_as_number___pyx_scope_struct_25_genexpr, /*tp_as_number*/
-  &__pyx_tp_as_sequence___pyx_scope_struct_25_genexpr, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping___pyx_scope_struct_25_genexpr, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  0, /*tp_str*/
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  &__pyx_tp_as_buffer___pyx_scope_struct_25_genexpr, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  0, /*tp_doc*/
-  __pyx_tp_traverse_5_cdec___pyx_scope_struct_25_genexpr, /*tp_traverse*/
-  __pyx_tp_clear_5_cdec___pyx_scope_struct_25_genexpr, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
   0, /*tp_iter*/
+  #endif
   0, /*tp_iternext*/
-  __pyx_methods_5_cdec___pyx_scope_struct_25_genexpr, /*tp_methods*/
+  __pyx_methods_5_cdec_TextGrammar, /*tp_methods*/
   0, /*tp_members*/
   0, /*tp_getset*/
   0, /*tp_base*/
@@ -28716,9 +25314,9 @@ static PyTypeObject __pyx_type_5_cdec___pyx_scope_struct_25_genexpr = {
   0, /*tp_descr_get*/
   0, /*tp_descr_set*/
   0, /*tp_dictoffset*/
-  0, /*tp_init*/
+  __pyx_pw_5_cdec_11TextGrammar_1__init__, /*tp_init*/
   0, /*tp_alloc*/
-  __pyx_tp_new_5_cdec___pyx_scope_struct_25_genexpr, /*tp_new*/
+  __pyx_tp_new_5_cdec_TextGrammar, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -28810,11 +25408,17 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__TypeError, __pyx_k__TypeError, sizeof(__pyx_k__TypeError), 0, 0, 1, 1},
   {&__pyx_n_s__ValueError, __pyx_k__ValueError, sizeof(__pyx_k__ValueError), 0, 0, 1, 1},
   {&__pyx_n_s____class__, __pyx_k____class__, sizeof(__pyx_k____class__), 0, 0, 1, 1},
+  {&__pyx_n_s____dict__, __pyx_k____dict__, sizeof(__pyx_k____dict__), 0, 0, 1, 1},
   {&__pyx_n_s____enter__, __pyx_k____enter__, sizeof(__pyx_k____enter__), 0, 0, 1, 1},
   {&__pyx_n_s____exit__, __pyx_k____exit__, sizeof(__pyx_k____exit__), 0, 0, 1, 1},
+  {&__pyx_n_s____import__, __pyx_k____import__, sizeof(__pyx_k____import__), 0, 0, 1, 1},
   {&__pyx_n_s____init__, __pyx_k____init__, sizeof(__pyx_k____init__), 0, 0, 1, 1},
   {&__pyx_n_s____main__, __pyx_k____main__, sizeof(__pyx_k____main__), 0, 0, 1, 1},
+  {&__pyx_n_s____metaclass__, __pyx_k____metaclass__, sizeof(__pyx_k____metaclass__), 0, 0, 1, 1},
+  {&__pyx_n_s____module__, __pyx_k____module__, sizeof(__pyx_k____module__), 0, 0, 1, 1},
   {&__pyx_n_s____name__, __pyx_k____name__, sizeof(__pyx_k____name__), 0, 0, 1, 1},
+  {&__pyx_n_s____pyx_vtable__, __pyx_k____pyx_vtable__, sizeof(__pyx_k____pyx_vtable__), 0, 0, 1, 1},
+  {&__pyx_n_s____qualname__, __pyx_k____qualname__, sizeof(__pyx_k____qualname__), 0, 0, 1, 1},
   {&__pyx_n_s____test__, __pyx_k____test__, sizeof(__pyx_k____test__), 0, 0, 1, 1},
   {&__pyx_n_s___cdec, __pyx_k___cdec, sizeof(__pyx_k___cdec), 0, 0, 1, 1},
   {&__pyx_n_s___make_config, __pyx_k___make_config, sizeof(__pyx_k___make_config), 0, 0, 1, 1},
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   {&__pyx_n_s___sa, __pyx_k___sa, sizeof(__pyx_k___sa), 0, 0, 1, 1},
   {&__pyx_n_s__a, __pyx_k__a, sizeof(__pyx_k__a), 0, 0, 1, 1},
   {&__pyx_n_s__alignments, __pyx_k__alignments, sizeof(__pyx_k__alignments), 0, 0, 1, 1},
-  {&__pyx_n_s__basestring, __pyx_k__basestring, sizeof(__pyx_k__basestring), 0, 0, 1, 1},
+  {&__pyx_n_s__append, __pyx_k__append, sizeof(__pyx_k__append), 0, 0, 1, 1},
+  {&__pyx_n_s__args, __pyx_k__args, sizeof(__pyx_k__args), 0, 0, 1, 1},
   {&__pyx_n_s__beam_alpha, __pyx_k__beam_alpha, sizeof(__pyx_k__beam_alpha), 0, 0, 1, 1},
   {&__pyx_n_s__cat, __pyx_k__cat, sizeof(__pyx_k__cat), 0, 0, 1, 1},
+  {&__pyx_n_s__close, __pyx_k__close, sizeof(__pyx_k__close), 0, 0, 1, 1},
   {&__pyx_n_s__config, __pyx_k__config, sizeof(__pyx_k__config), 0, 0, 1, 1},
   {&__pyx_n_s__config_str, __pyx_k__config_str, sizeof(__pyx_k__config_str), 0, 0, 1, 1},
   {&__pyx_n_s__csplit, __pyx_k__csplit, sizeof(__pyx_k__csplit), 0, 0, 1, 1},
@@ -28843,6 +25449,7 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__format, __pyx_k__format, sizeof(__pyx_k__format), 0, 0, 1, 1},
   {&__pyx_n_s__fst, __pyx_k__fst, sizeof(__pyx_k__fst), 0, 0, 1, 1},
   {&__pyx_n_s__genexpr, __pyx_k__genexpr, sizeof(__pyx_k__genexpr), 0, 0, 1, 1},
+  {&__pyx_n_s__get, __pyx_k__get, sizeof(__pyx_k__get), 0, 0, 1, 1},
   {&__pyx_n_s__grammar, __pyx_k__grammar, sizeof(__pyx_k__grammar), 0, 0, 1, 1},
   {&__pyx_n_s__hyp, __pyx_k__hyp, sizeof(__pyx_k__hyp), 0, 0, 1, 1},
   {&__pyx_n_s__hypergraph, __pyx_k__hypergraph, sizeof(__pyx_k__hypergraph), 0, 0, 1, 1},
@@ -28874,6 +25481,7 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {&__pyx_n_s__score, __pyx_k__score, sizeof(__pyx_k__score), 0, 0, 1, 1},
   {&__pyx_n_s__scores, __pyx_k__scores, sizeof(__pyx_k__scores), 0, 0, 1, 1},
   {&__pyx_n_s__self, __pyx_k__self, sizeof(__pyx_k__self), 0, 0, 1, 1},
+  {&__pyx_n_s__send, __pyx_k__send, sizeof(__pyx_k__send), 0, 0, 1, 1},
   {&__pyx_n_s__sentence, __pyx_k__sentence, sizeof(__pyx_k__sentence), 0, 0, 1, 1},
   {&__pyx_n_s__set_silent, __pyx_k__set_silent, sizeof(__pyx_k__set_silent), 0, 0, 1, 1},
   {&__pyx_n_s__span, __pyx_k__span, sizeof(__pyx_k__span), 0, 0, 1, 1},
@@ -28882,6 +25490,7 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_n_s__super, __pyx_k__super, sizeof(__pyx_k__super), 0, 0, 1, 1},
   {&__pyx_n_s__tagger, __pyx_k__tagger, sizeof(__pyx_k__tagger), 0, 0, 1, 1},
+  {&__pyx_n_s__throw, __pyx_k__throw, sizeof(__pyx_k__throw), 0, 0, 1, 1},
   {&__pyx_n_s__utf8, __pyx_k__utf8, sizeof(__pyx_k__utf8), 0, 0, 1, 1},
   {&__pyx_n_s__value, __pyx_k__value, sizeof(__pyx_k__value), 0, 0, 1, 1},
   {&__pyx_n_s__weight, __pyx_k__weight, sizeof(__pyx_k__weight), 0, 0, 1, 1},
@@ -28889,18 +25498,17 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
   {0, 0, 0, 0, 0, 0, 0}
 };
 static int __Pyx_InitCachedBuiltins(void) {
-  __pyx_builtin_Exception = __Pyx_GetName(__pyx_b, __pyx_n_s__Exception); if (!__pyx_builtin_Exception) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_TypeError = __Pyx_GetName(__pyx_b, __pyx_n_s__TypeError); if (!__pyx_builtin_TypeError) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 13; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_KeyError = __Pyx_GetName(__pyx_b, __pyx_n_s__KeyError); if (!__pyx_builtin_KeyError) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 23; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_range = __Pyx_GetName(__pyx_b, __pyx_n_s__range); if (!__pyx_builtin_range) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 34; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_NotImplemented = __Pyx_GetName(__pyx_b, __pyx_n_s__NotImplemented); if (!__pyx_builtin_NotImplemented) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 95; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_super = __Pyx_GetName(__pyx_b, __pyx_n_s__super); if (!__pyx_builtin_super) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 191; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_ValueError = __Pyx_GetName(__pyx_b, __pyx_n_s__ValueError); if (!__pyx_builtin_ValueError) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 226; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_basestring = __Pyx_GetName(__pyx_b, __pyx_n_s__basestring); if (!__pyx_builtin_basestring) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 124; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_eval = __Pyx_GetName(__pyx_b, __pyx_n_s__eval); if (!__pyx_builtin_eval) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 145; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_enumerate = __Pyx_GetName(__pyx_b, __pyx_n_s__enumerate); if (!__pyx_builtin_enumerate) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 14; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_IndexError = __Pyx_GetName(__pyx_b, __pyx_n_s__IndexError); if (!__pyx_builtin_IndexError) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_builtin_open = __Pyx_GetName(__pyx_b, __pyx_n_s__open); if (!__pyx_builtin_open) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 91; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_Exception = __Pyx_GetBuiltinName(__pyx_n_s__Exception); if (!__pyx_builtin_Exception) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_TypeError = __Pyx_GetBuiltinName(__pyx_n_s__TypeError); if (!__pyx_builtin_TypeError) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 13; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_KeyError = __Pyx_GetBuiltinName(__pyx_n_s__KeyError); if (!__pyx_builtin_KeyError) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 23; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_range = __Pyx_GetBuiltinName(__pyx_n_s__range); if (!__pyx_builtin_range) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 34; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_NotImplemented = __Pyx_GetBuiltinName(__pyx_n_s__NotImplemented); if (!__pyx_builtin_NotImplemented) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 95; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_super = __Pyx_GetBuiltinName(__pyx_n_s__super); if (!__pyx_builtin_super) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 191; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_ValueError = __Pyx_GetBuiltinName(__pyx_n_s__ValueError); if (!__pyx_builtin_ValueError) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 226; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_eval = __Pyx_GetBuiltinName(__pyx_n_s__eval); if (!__pyx_builtin_eval) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 145; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_enumerate = __Pyx_GetBuiltinName(__pyx_n_s__enumerate); if (!__pyx_builtin_enumerate) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 14; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_IndexError = __Pyx_GetBuiltinName(__pyx_n_s__IndexError); if (!__pyx_builtin_IndexError) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_builtin_open = __Pyx_GetBuiltinName(__pyx_n_s__open); if (!__pyx_builtin_open) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 90; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   return 0;
   __pyx_L1_error:;
   return -1;
@@ -28921,7 +25529,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_2);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_2));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/vectors.pxi":95
+  /* "/Users/vchahun/Sandbox/cdec/python/src/vectors.pxi":95
  *         elif op == 3: # !=
  *             return not (x == y)
  *         raise NotImplemented('comparison not implemented for SparseVector')             # <<<<<<<<<<<<<<
@@ -28932,7 +25540,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_5);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_5));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":6
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":6
  * 
  * def _phrase(phrase):
  *     return ' '.join(w.encode('utf8') if isinstance(w, unicode) else str(w) for w in phrase)             # <<<<<<<<<<<<<<
@@ -28943,7 +25551,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_6);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_6));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":226
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":226
  *                 trule = convert_rule(trule)
  *             elif not isinstance(trule, TRule):
  *                 raise ValueError('the grammar should contain TRule objects')             # <<<<<<<<<<<<<<
@@ -28953,7 +25561,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_14);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_14));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":244
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":244
  *         elif op == 3: # !=
  *             return not (x == y)
  *         raise NotImplemented('comparison not implemented for HypergraphEdge')             # <<<<<<<<<<<<<<
@@ -28964,7 +25572,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_19);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_19));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/hypergraph.pxi":281
+  /* "/Users/vchahun/Sandbox/cdec/python/src/hypergraph.pxi":281
  *         elif op == 3: # !=
  *             return not (x == y)
  *         raise NotImplemented('comparison not implemented for HypergraphNode')             # <<<<<<<<<<<<<<
@@ -28973,7 +25581,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_21);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_21));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":26
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":26
  *     def __getitem__(self, int index):
  *         if not 0 <= index < len(self):
  *             raise IndexError('lattice index out of range')             # <<<<<<<<<<<<<<
@@ -28984,7 +25592,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_24);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_24));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":39
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":39
  *     def __setitem__(self, int index, tuple arcs):
  *         if not 0 <= index < len(self):
  *             raise IndexError('lattice index out of range')             # <<<<<<<<<<<<<<
@@ -28995,7 +25603,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_25);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_25));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":69
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":69
  *             for i in range(len(self)):
  *                 for label, weight, delta in self[i]:
  *                     yield '%d -> %d [label="%s"];' % (i, i+delta, label.replace('"', '\\"'))             # <<<<<<<<<<<<<<
@@ -29006,7 +25614,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_32);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_32));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":63
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":63
  *     def todot(self):
  *         """lattice.todot() -> Representation of the lattice in GraphViz dot format."""
  *         def lines():             # <<<<<<<<<<<<<<
@@ -29018,7 +25626,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_35));
   __pyx_k_codeobj_36 = (PyObject*)__Pyx_PyCode_New(0, 0, 4, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_35, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_37, __pyx_n_s__lines, 63, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_36)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 63; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/lattice.pxi":72
+  /* "/Users/vchahun/Sandbox/cdec/python/src/lattice.pxi":72
  *             yield '%d [shape=doublecircle]' % len(self)
  *             yield '}'
  *         return '\n'.join(lines()).encode('utf8')             # <<<<<<<<<<<<<<
@@ -29029,7 +25637,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_40);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_40));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":50
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":50
  *     def __getitem__(self, int index):
  *         if not 0 <= index < len(self):
  *             raise IndexError('sufficient stats vector index out of range')             # <<<<<<<<<<<<<<
@@ -29040,7 +25648,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_42);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_42));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":84
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":84
  *     def __getitem__(self,int k):
  *         if not 0 <= k < self.cs.size():
  *             raise IndexError('candidate set index out of range')             # <<<<<<<<<<<<<<
@@ -29051,29 +25659,29 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_44);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_44));
 
-  /* "_cdec.pyx":93
+  /* "_cdec.pyx":92
  *         with open(weights) as fp:
  *             for line in fp:
  *                 if line.strip().startswith('#'): continue             # <<<<<<<<<<<<<<
  *                 fname, value = line.split()
  *                 self.weights[fname.strip()] = float(value)
  */
-  __pyx_k_tuple_50 = PyTuple_Pack(1, ((PyObject *)__pyx_kp_s_49)); if (unlikely(!__pyx_k_tuple_50)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 93; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_50 = PyTuple_Pack(1, ((PyObject *)__pyx_kp_s_49)); if (unlikely(!__pyx_k_tuple_50)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 92; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_k_tuple_50);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_50));
 
-  /* "_cdec.pyx":91
+  /* "_cdec.pyx":90
  *     def read_weights(self, weights):
  *         """decoder.read_weights(filename): Read decoder weights from a file."""
  *         with open(weights) as fp:             # <<<<<<<<<<<<<<
  *             for line in fp:
  *                 if line.strip().startswith('#'): continue
  */
-  __pyx_k_tuple_51 = PyTuple_Pack(3, Py_None, Py_None, Py_None); if (unlikely(!__pyx_k_tuple_51)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 91; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_k_tuple_51 = PyTuple_Pack(3, Py_None, Py_None, Py_None); if (unlikely(!__pyx_k_tuple_51)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 90; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_k_tuple_51);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_51));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":5
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":5
  * import cdec.sa._sa as _sa
  * 
  * def _phrase(phrase):             # <<<<<<<<<<<<<<
@@ -29085,7 +25693,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_55));
   __pyx_k_codeobj_56 = (PyObject*)__Pyx_PyCode_New(1, 0, 3, 0, 0, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_k_tuple_55, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_57, __pyx_n_s___phrase, 5, __pyx_empty_bytes); if (unlikely(!__pyx_k_codeobj_56)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":194
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":194
  *         return []
  * 
  * BLEU = Scorer('IBM_BLEU')             # <<<<<<<<<<<<<<
@@ -29096,7 +25704,7 @@ static int __Pyx_InitCachedConstants(void) {
   __Pyx_GOTREF(__pyx_k_tuple_58);
   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_58));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":195
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":195
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  * QCRI = Scorer('QCRI_BLEU')             # <<<<<<<<<<<<<<
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   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_59));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":196
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":196
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  * QCRI = Scorer('QCRI_BLEU')
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-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":197
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":197
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  * TER = Scorer('TER')
  * CER = Scorer('CER')             # <<<<<<<<<<<<<<
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   __Pyx_GIVEREF(((PyObject *)__pyx_k_tuple_61));
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":198
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":198
  * TER = Scorer('TER')
  * CER = Scorer('CER')
  * SSK = Scorer('SSK')             # <<<<<<<<<<<<<<
@@ -29188,6 +25796,9 @@ PyMODINIT_FUNC PyInit__cdec(void)
   PyObject *__pyx_t_2 = NULL;
   PyObject *__pyx_t_3 = NULL;
   PyObject *__pyx_t_4 = NULL;
+  int __pyx_lineno = 0;
+  const char *__pyx_filename = NULL;
+  int __pyx_clineno = 0;
   __Pyx_RefNannyDeclarations
   #if CYTHON_REFNANNY
   __Pyx_RefNanny = __Pyx_RefNannyImportAPI("refnanny");
@@ -29225,6 +25836,8 @@ PyMODINIT_FUNC PyInit__cdec(void)
   __pyx_m = PyModule_Create(&__pyx_moduledef);
   #endif
   if (unlikely(!__pyx_m)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_d = PyModule_GetDict(__pyx_m); if (unlikely(!__pyx_d)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  Py_INCREF(__pyx_d);
   #if PY_MAJOR_VERSION >= 3
   {
     PyObject *modules = PyImport_GetModuleDict(); if (unlikely(!modules)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
@@ -29240,6 +25853,9 @@ PyMODINIT_FUNC PyInit__cdec(void)
   if (__Pyx_SetAttrString(__pyx_m, "__builtins__", __pyx_b) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;};
   /*--- Initialize various global constants etc. ---*/
   if (unlikely(__Pyx_InitGlobals() < 0)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  #if PY_MAJOR_VERSION < 3 && (__PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT)
+  if (__Pyx_init_sys_getdefaultencoding_params() < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  #endif
   if (__pyx_module_is_main__cdec) {
     if (__Pyx_SetAttrString(__pyx_m, "__name__", __pyx_n_s____main__) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;};
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@@ -29251,45 +25867,11 @@ PyMODINIT_FUNC PyInit__cdec(void)
   /*--- Variable export code ---*/
   /*--- Function export code ---*/
   /*--- Type init code ---*/
-  if (PyType_Ready(&__pyx_type_5_cdec_DenseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  #if CYTHON_COMPILING_IN_CPYTHON
-  {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_DenseVector, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_11DenseVector___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_11DenseVector___init__.doc = __pyx_doc_5_cdec_11DenseVector___init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_11DenseVector___init__;
-    }
-  }
-  #endif
-  if (__Pyx_SetAttrString(__pyx_m, "DenseVector", (PyObject *)&__pyx_type_5_cdec_DenseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_DenseVector = &__pyx_type_5_cdec_DenseVector;
-  if (PyType_Ready(&__pyx_type_5_cdec_SparseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  #if CYTHON_COMPILING_IN_CPYTHON
-  {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_SparseVector, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_12SparseVector___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_12SparseVector___init__.doc = __pyx_doc_5_cdec_12SparseVector___init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_12SparseVector___init__;
-    }
-  }
-  #endif
-  if (__Pyx_SetAttrString(__pyx_m, "SparseVector", (PyObject *)&__pyx_type_5_cdec_SparseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_SparseVector = &__pyx_type_5_cdec_SparseVector;
-  if (PyType_Ready(&__pyx_type_5_cdec_NT) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  #if CYTHON_COMPILING_IN_CPYTHON
-  {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_NT, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_2NT___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_2NT___init__.doc = __pyx_doc_5_cdec_2NT___init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_2NT___init__;
-    }
-  }
-  #endif
-  if (__Pyx_SetAttrString(__pyx_m, "NT", (PyObject *)&__pyx_type_5_cdec_NT) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_NT = &__pyx_type_5_cdec_NT;
+  if (PyType_Ready(&__pyx_type_5_cdec_Scorer) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 121; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "Scorer", (PyObject *)&__pyx_type_5_cdec_Scorer) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 121; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Scorer = &__pyx_type_5_cdec_Scorer;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_24___init__) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_24___init__ = &__pyx_type_5_cdec___pyx_scope_struct_24___init__;
   if (PyType_Ready(&__pyx_type_5_cdec_NTRef) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 21; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
   {
@@ -29303,6 +25885,24 @@ PyMODINIT_FUNC PyInit__cdec(void)
   #endif
   if (__Pyx_SetAttrString(__pyx_m, "NTRef", (PyObject *)&__pyx_type_5_cdec_NTRef) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 21; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec_NTRef = &__pyx_type_5_cdec_NTRef;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_22___iter__) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 90; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_22___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_22___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec_Grammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 193; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "Grammar", (PyObject *)&__pyx_type_5_cdec_Grammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 193; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Grammar = &__pyx_type_5_cdec_Grammar;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_20_lines) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 63; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_20_lines = &__pyx_type_5_cdec___pyx_scope_struct_20_lines;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_12_sample_trees) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 108; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_12_sample_trees = &__pyx_type_5_cdec___pyx_scope_struct_12_sample_trees;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_13___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 161; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_13___get__ = &__pyx_type_5_cdec___pyx_scope_struct_13___get__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_2__phrase) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_2__phrase = &__pyx_type_5_cdec___pyx_scope_struct_2__phrase;
+  if (PyType_Ready(&__pyx_type_5_cdec_CandidateSet) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "CandidateSet", (PyObject *)&__pyx_type_5_cdec_CandidateSet) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_CandidateSet = &__pyx_type_5_cdec_CandidateSet;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_14___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 167; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_14___get__ = &__pyx_type_5_cdec___pyx_scope_struct_14___get__;
   if (PyType_Ready(&__pyx_type_5_cdec_TRule) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 49; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
   {
@@ -29316,6 +25916,8 @@ PyMODINIT_FUNC PyInit__cdec(void)
   #endif
   if (__Pyx_SetAttrString(__pyx_m, "TRule", (PyObject *)&__pyx_type_5_cdec_TRule) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 49; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec_TRule = &__pyx_type_5_cdec_TRule;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_3_genexpr) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 6; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_3_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_3_genexpr;
   __pyx_type_5_cdec_MRule.tp_base = __pyx_ptype_5_cdec_TRule;
   if (PyType_Ready(&__pyx_type_5_cdec_MRule) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 177; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
@@ -29330,146 +25932,160 @@ PyMODINIT_FUNC PyInit__cdec(void)
   #endif
   if (__Pyx_SetAttrString(__pyx_m, "MRule", (PyObject *)&__pyx_type_5_cdec_MRule) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 177; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec_MRule = &__pyx_type_5_cdec_MRule;
-  if (PyType_Ready(&__pyx_type_5_cdec_Grammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 193; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "Grammar", (PyObject *)&__pyx_type_5_cdec_Grammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 193; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Grammar = &__pyx_type_5_cdec_Grammar;
-  __pyx_type_5_cdec_TextGrammar.tp_base = __pyx_ptype_5_cdec_Grammar;
-  if (PyType_Ready(&__pyx_type_5_cdec_TextGrammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_5_cdec_SegmentEvaluator) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "SegmentEvaluator", (PyObject *)&__pyx_type_5_cdec_SegmentEvaluator) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_SegmentEvaluator = &__pyx_type_5_cdec_SegmentEvaluator;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_25_genexpr) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 56; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_25_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_25_genexpr;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_19_todot) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 61; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_19_todot = &__pyx_type_5_cdec___pyx_scope_struct_19_todot;
+  if (PyType_Ready(&__pyx_type_5_cdec_Candidate) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "Candidate", (PyObject *)&__pyx_type_5_cdec_Candidate) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Candidate = &__pyx_type_5_cdec_Candidate;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_6_genexpr) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 173; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_6_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_6_genexpr;
+  if (PyType_Ready(&__pyx_type_5_cdec_NT) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_TextGrammar, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_NT, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_11TextGrammar___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_11TextGrammar___init__.doc = __pyx_doc_5_cdec_11TextGrammar___init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_11TextGrammar___init__;
+      __pyx_wrapperbase_5_cdec_2NT___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_2NT___init__.doc = __pyx_doc_5_cdec_2NT___init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_2NT___init__;
     }
   }
   #endif
-  if (__Pyx_SetAttrString(__pyx_m, "TextGrammar", (PyObject *)&__pyx_type_5_cdec_TextGrammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_TextGrammar = &__pyx_type_5_cdec_TextGrammar;
-  __pyx_vtabptr_5_cdec_Hypergraph = &__pyx_vtable_5_cdec_Hypergraph;
-  __pyx_vtable_5_cdec_Hypergraph._rng = (MT19937 *(*)(struct __pyx_obj_5_cdec_Hypergraph *))__pyx_f_5_cdec_10Hypergraph__rng;
-  if (PyType_Ready(&__pyx_type_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetVtable(__pyx_type_5_cdec_Hypergraph.tp_dict, __pyx_vtabptr_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "Hypergraph", (PyObject *)&__pyx_type_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Hypergraph = &__pyx_type_5_cdec_Hypergraph;
+  if (__Pyx_SetAttrString(__pyx_m, "NT", (PyObject *)&__pyx_type_5_cdec_NT) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 8; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_NT = &__pyx_type_5_cdec_NT;
   __pyx_vtabptr_5_cdec_HypergraphEdge = &__pyx_vtable_5_cdec_HypergraphEdge;
   __pyx_vtable_5_cdec_HypergraphEdge.init = (PyObject *(*)(struct __pyx_obj_5_cdec_HypergraphEdge *, Hypergraph *, unsigned int))__pyx_f_5_cdec_14HypergraphEdge_init;
   if (PyType_Ready(&__pyx_type_5_cdec_HypergraphEdge) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   if (__Pyx_SetVtable(__pyx_type_5_cdec_HypergraphEdge.tp_dict, __pyx_vtabptr_5_cdec_HypergraphEdge) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   if (__Pyx_SetAttrString(__pyx_m, "HypergraphEdge", (PyObject *)&__pyx_type_5_cdec_HypergraphEdge) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec_HypergraphEdge = &__pyx_type_5_cdec_HypergraphEdge;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_1___iter__) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 72; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_1___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_1___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_16___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 256; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_16___get__ = &__pyx_type_5_cdec___pyx_scope_struct_16___get__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_4___get__) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 131; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_4___get__ = &__pyx_type_5_cdec___pyx_scope_struct_4___get__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_18___iter__) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 56; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_18___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_18___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec_Decoder) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  #if CYTHON_COMPILING_IN_CPYTHON
+  {
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_Decoder, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
+      __pyx_wrapperbase_5_cdec_7Decoder___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_7Decoder___init__.doc = __pyx_doc_5_cdec_7Decoder___init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_7Decoder___init__;
+    }
+  }
+  #endif
+  if (__Pyx_SetAttrString(__pyx_m, "Decoder", (PyObject *)&__pyx_type_5_cdec_Decoder) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Decoder = &__pyx_type_5_cdec_Decoder;
   __pyx_vtabptr_5_cdec_HypergraphNode = &__pyx_vtable_5_cdec_HypergraphNode;
   __pyx_vtable_5_cdec_HypergraphNode.init = (PyObject *(*)(struct __pyx_obj_5_cdec_HypergraphNode *, Hypergraph *, unsigned int))__pyx_f_5_cdec_14HypergraphNode_init;
   if (PyType_Ready(&__pyx_type_5_cdec_HypergraphNode) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 246; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   if (__Pyx_SetVtable(__pyx_type_5_cdec_HypergraphNode.tp_dict, __pyx_vtabptr_5_cdec_HypergraphNode) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 246; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   if (__Pyx_SetAttrString(__pyx_m, "HypergraphNode", (PyObject *)&__pyx_type_5_cdec_HypergraphNode) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 246; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec_HypergraphNode = &__pyx_type_5_cdec_HypergraphNode;
-  if (PyType_Ready(&__pyx_type_5_cdec_Lattice) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_5_cdec_SparseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_Lattice, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_SparseVector, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_7Lattice_2__init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_7Lattice_2__init__.doc = __pyx_doc_5_cdec_7Lattice_2__init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_7Lattice_2__init__;
+      __pyx_wrapperbase_5_cdec_12SparseVector___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_12SparseVector___init__.doc = __pyx_doc_5_cdec_12SparseVector___init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_12SparseVector___init__;
     }
   }
   #endif
-  if (__Pyx_SetAttrString(__pyx_m, "Lattice", (PyObject *)&__pyx_type_5_cdec_Lattice) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Lattice = &__pyx_type_5_cdec_Lattice;
-  if (PyType_Ready(&__pyx_type_5_cdec_Candidate) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "Candidate", (PyObject *)&__pyx_type_5_cdec_Candidate) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Candidate = &__pyx_type_5_cdec_Candidate;
-  if (PyType_Ready(&__pyx_type_5_cdec_SufficientStats) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "SufficientStats", (PyObject *)&__pyx_type_5_cdec_SufficientStats) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_SufficientStats = &__pyx_type_5_cdec_SufficientStats;
-  if (PyType_Ready(&__pyx_type_5_cdec_CandidateSet) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "CandidateSet", (PyObject *)&__pyx_type_5_cdec_CandidateSet) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 65; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_CandidateSet = &__pyx_type_5_cdec_CandidateSet;
-  if (PyType_Ready(&__pyx_type_5_cdec_SegmentEvaluator) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "SegmentEvaluator", (PyObject *)&__pyx_type_5_cdec_SegmentEvaluator) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 100; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_SegmentEvaluator = &__pyx_type_5_cdec_SegmentEvaluator;
-  if (PyType_Ready(&__pyx_type_5_cdec_Scorer) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 121; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "Scorer", (PyObject *)&__pyx_type_5_cdec_Scorer) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 121; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Scorer = &__pyx_type_5_cdec_Scorer;
-  if (PyType_Ready(&__pyx_type_5_cdec_Metric) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 176; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  if (__Pyx_SetAttrString(__pyx_m, "Metric", (PyObject *)&__pyx_type_5_cdec_Metric) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 176; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Metric = &__pyx_type_5_cdec_Metric;
-  if (PyType_Ready(&__pyx_type_5_cdec_Decoder) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "SparseVector", (PyObject *)&__pyx_type_5_cdec_SparseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 48; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_SparseVector = &__pyx_type_5_cdec_SparseVector;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_17___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 262; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_17___get__ = &__pyx_type_5_cdec___pyx_scope_struct_17___get__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct____iter__) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct____iter__ = &__pyx_type_5_cdec___pyx_scope_struct____iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_21___iter__) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 44; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_21___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_21___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec_DenseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   #if CYTHON_COMPILING_IN_CPYTHON
   {
-    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_Decoder, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_DenseVector, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
     if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
-      __pyx_wrapperbase_5_cdec_7Decoder___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
-      __pyx_wrapperbase_5_cdec_7Decoder___init__.doc = __pyx_doc_5_cdec_7Decoder___init__;
-      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_7Decoder___init__;
+      __pyx_wrapperbase_5_cdec_11DenseVector___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_11DenseVector___init__.doc = __pyx_doc_5_cdec_11DenseVector___init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_11DenseVector___init__;
     }
   }
   #endif
-  if (__Pyx_SetAttrString(__pyx_m, "Decoder", (PyObject *)&__pyx_type_5_cdec_Decoder) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 43; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec_Decoder = &__pyx_type_5_cdec_Decoder;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct____iter__) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct____iter__ = &__pyx_type_5_cdec___pyx_scope_struct____iter__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_1___iter__) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 72; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_1___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_1___iter__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_2__phrase) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_2__phrase = &__pyx_type_5_cdec___pyx_scope_struct_2__phrase;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_3_genexpr) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 6; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_3_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_3_genexpr;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_4___get__) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 131; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_4___get__ = &__pyx_type_5_cdec___pyx_scope_struct_4___get__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_5___str__) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 172; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_5___str__ = &__pyx_type_5_cdec___pyx_scope_struct_5___str__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_6_genexpr) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 173; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_6_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_6_genexpr;
+  if (__Pyx_SetAttrString(__pyx_m, "DenseVector", (PyObject *)&__pyx_type_5_cdec_DenseVector) < 0) {__pyx_filename = __pyx_f[1]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_DenseVector = &__pyx_type_5_cdec_DenseVector;
   if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_7___iter__) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 199; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec___pyx_scope_struct_7___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_7___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec_Metric) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 176; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "Metric", (PyObject *)&__pyx_type_5_cdec_Metric) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 176; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Metric = &__pyx_type_5_cdec_Metric;
+  if (PyType_Ready(&__pyx_type_5_cdec_SufficientStats) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "SufficientStats", (PyObject *)&__pyx_type_5_cdec_SufficientStats) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_SufficientStats = &__pyx_type_5_cdec_SufficientStats;
   if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_8_kbest) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 49; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec___pyx_scope_struct_8_kbest = &__pyx_type_5_cdec___pyx_scope_struct_8_kbest;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees = &__pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees;
   if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_10_kbest_features) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 81; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec___pyx_scope_struct_10_kbest_features = &__pyx_type_5_cdec___pyx_scope_struct_10_kbest_features;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_11_sample) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 97; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_11_sample = &__pyx_type_5_cdec___pyx_scope_struct_11_sample;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_12_sample_trees) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 108; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_12_sample_trees = &__pyx_type_5_cdec___pyx_scope_struct_12_sample_trees;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_13___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 161; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_13___get__ = &__pyx_type_5_cdec___pyx_scope_struct_13___get__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_14___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 167; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_14___get__ = &__pyx_type_5_cdec___pyx_scope_struct_14___get__;
   if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_15___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 216; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec___pyx_scope_struct_15___get__ = &__pyx_type_5_cdec___pyx_scope_struct_15___get__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_16___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 256; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_16___get__ = &__pyx_type_5_cdec___pyx_scope_struct_16___get__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_17___get__) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 262; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_17___get__ = &__pyx_type_5_cdec___pyx_scope_struct_17___get__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_18___iter__) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 56; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_18___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_18___iter__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_19_todot) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 61; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_19_todot = &__pyx_type_5_cdec___pyx_scope_struct_19_todot;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_20_lines) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 63; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_20_lines = &__pyx_type_5_cdec___pyx_scope_struct_20_lines;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_21___iter__) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 44; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_21___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_21___iter__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_22___iter__) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 90; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_22___iter__ = &__pyx_type_5_cdec___pyx_scope_struct_22___iter__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_5___str__) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 172; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_5___str__ = &__pyx_type_5_cdec___pyx_scope_struct_5___str__;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 62; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_9_kbest_trees = &__pyx_type_5_cdec___pyx_scope_struct_9_kbest_trees;
+  __pyx_vtabptr_5_cdec_Hypergraph = &__pyx_vtable_5_cdec_Hypergraph;
+  __pyx_vtable_5_cdec_Hypergraph._rng = (MT19937 *(*)(struct __pyx_obj_5_cdec_Hypergraph *))__pyx_f_5_cdec_10Hypergraph__rng;
+  if (PyType_Ready(&__pyx_type_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetVtable(__pyx_type_5_cdec_Hypergraph.tp_dict, __pyx_vtabptr_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (__Pyx_SetAttrString(__pyx_m, "Hypergraph", (PyObject *)&__pyx_type_5_cdec_Hypergraph) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 4; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Hypergraph = &__pyx_type_5_cdec_Hypergraph;
+  if (PyType_Ready(&__pyx_type_5_cdec_Lattice) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  #if CYTHON_COMPILING_IN_CPYTHON
+  {
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_Lattice, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
+      __pyx_wrapperbase_5_cdec_7Lattice_2__init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_7Lattice_2__init__.doc = __pyx_doc_5_cdec_7Lattice_2__init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_7Lattice_2__init__;
+    }
+  }
+  #endif
+  if (__Pyx_SetAttrString(__pyx_m, "Lattice", (PyObject *)&__pyx_type_5_cdec_Lattice) < 0) {__pyx_filename = __pyx_f[4]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_Lattice = &__pyx_type_5_cdec_Lattice;
+  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_11_sample) < 0) {__pyx_filename = __pyx_f[3]; __pyx_lineno = 97; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec___pyx_scope_struct_11_sample = &__pyx_type_5_cdec___pyx_scope_struct_11_sample;
   if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_23__make_config) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_5_cdec___pyx_scope_struct_23__make_config = &__pyx_type_5_cdec___pyx_scope_struct_23__make_config;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_24___init__) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 47; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_24___init__ = &__pyx_type_5_cdec___pyx_scope_struct_24___init__;
-  if (PyType_Ready(&__pyx_type_5_cdec___pyx_scope_struct_25_genexpr) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 56; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_5_cdec___pyx_scope_struct_25_genexpr = &__pyx_type_5_cdec___pyx_scope_struct_25_genexpr;
+  __pyx_type_5_cdec_TextGrammar.tp_base = __pyx_ptype_5_cdec_Grammar;
+  if (PyType_Ready(&__pyx_type_5_cdec_TextGrammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  #if CYTHON_COMPILING_IN_CPYTHON
+  {
+    PyObject *wrapper = __Pyx_GetAttrString((PyObject *)&__pyx_type_5_cdec_TextGrammar, "__init__"); if (unlikely(!wrapper)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+    if (Py_TYPE(wrapper) == &PyWrapperDescr_Type) {
+      __pyx_wrapperbase_5_cdec_11TextGrammar___init__ = *((PyWrapperDescrObject *)wrapper)->d_base;
+      __pyx_wrapperbase_5_cdec_11TextGrammar___init__.doc = __pyx_doc_5_cdec_11TextGrammar___init__;
+      ((PyWrapperDescrObject *)wrapper)->d_base = &__pyx_wrapperbase_5_cdec_11TextGrammar___init__;
+    }
+  }
+  #endif
+  if (__Pyx_SetAttrString(__pyx_m, "TextGrammar", (PyObject *)&__pyx_type_5_cdec_TextGrammar) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 217; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_5_cdec_TextGrammar = &__pyx_type_5_cdec_TextGrammar;
   /*--- Type import code ---*/
-  __pyx_ptype_4cdec_2sa_3_sa_FloatList = __Pyx_ImportType("cdec.sa._sa", "FloatList", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_FloatList), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_FloatList)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_vtabptr_4cdec_2sa_3_sa_FloatList = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_FloatList*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_FloatList->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_FloatList)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_4cdec_2sa_3_sa_IntList = __Pyx_ImportType("cdec.sa._sa", "IntList", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_IntList), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_IntList)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_vtabptr_4cdec_2sa_3_sa_IntList = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_IntList*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_IntList->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_IntList)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_4cdec_2sa_3_sa_FeatureVector = __Pyx_ImportType("cdec.sa._sa", "FeatureVector", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_FeatureVector), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_FeatureVector)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_4cdec_2sa_3_sa_Phrase = __Pyx_ImportType("cdec.sa._sa", "Phrase", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_Phrase), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_Phrase)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_vtabptr_4cdec_2sa_3_sa_Phrase = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_Phrase*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_Phrase->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_Phrase)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
-  __pyx_ptype_4cdec_2sa_3_sa_Rule = __Pyx_ImportType("cdec.sa._sa", "Rule", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_Rule), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_Rule)) {__pyx_filename = __pyx_f[7]; __pyx_lineno = 35; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_4cdec_2sa_3_sa_FloatList = __Pyx_ImportType("cdec.sa._sa", "FloatList", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_FloatList), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_FloatList)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_vtabptr_4cdec_2sa_3_sa_FloatList = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_FloatList*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_FloatList->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_FloatList)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_4cdec_2sa_3_sa_IntList = __Pyx_ImportType("cdec.sa._sa", "IntList", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_IntList), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_IntList)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_vtabptr_4cdec_2sa_3_sa_IntList = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_IntList*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_IntList->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_IntList)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 12; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_4cdec_2sa_3_sa_FeatureVector = __Pyx_ImportType("cdec.sa._sa", "FeatureVector", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_FeatureVector), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_FeatureVector)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_4cdec_2sa_3_sa_Phrase = __Pyx_ImportType("cdec.sa._sa", "Phrase", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_Phrase), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_Phrase)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_vtabptr_4cdec_2sa_3_sa_Phrase = (struct __pyx_vtabstruct_4cdec_2sa_3_sa_Phrase*)__Pyx_GetVtable(__pyx_ptype_4cdec_2sa_3_sa_Phrase->tp_dict); if (unlikely(!__pyx_vtabptr_4cdec_2sa_3_sa_Phrase)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 29; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_ptype_4cdec_2sa_3_sa_Rule = __Pyx_ImportType("cdec.sa._sa", "Rule", sizeof(struct __pyx_obj_4cdec_2sa_3_sa_Rule), 1); if (unlikely(!__pyx_ptype_4cdec_2sa_3_sa_Rule)) {__pyx_filename = __pyx_f[6]; __pyx_lineno = 35; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   /*--- Variable import code ---*/
   /*--- Function import code ---*/
   __pyx_t_1 = __Pyx_ImportModule("cdec.sa._sa"); if (!__pyx_t_1) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
@@ -29480,7 +26096,7 @@ PyMODINIT_FUNC PyInit__cdec(void)
   Py_DECREF(__pyx_t_1); __pyx_t_1 = 0;
   /*--- Execution code ---*/
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":3
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":3
  * cimport grammar
  * cimport cdec.sa._sa as _sa
  * import cdec.sa._sa as _sa             # <<<<<<<<<<<<<<
@@ -29495,10 +26111,10 @@ PyMODINIT_FUNC PyInit__cdec(void)
   __pyx_t_3 = __Pyx_Import(((PyObject *)__pyx_n_s_53), ((PyObject *)__pyx_t_2), -1); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
   __Pyx_DECREF(((PyObject *)__pyx_t_2)); __pyx_t_2 = 0;
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s___sa, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s___sa, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 3; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/grammar.pxi":5
+  /* "/Users/vchahun/Sandbox/cdec/python/src/grammar.pxi":5
  * import cdec.sa._sa as _sa
  * 
  * def _phrase(phrase):             # <<<<<<<<<<<<<<
@@ -29507,10 +26123,10 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyCFunction_NewEx(&__pyx_mdef_5_cdec_1_phrase, NULL, __pyx_n_s___cdec); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s___phrase, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s___phrase, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[2]; __pyx_lineno = 5; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":194
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":194
  *         return []
  * 
  * BLEU = Scorer('IBM_BLEU')             # <<<<<<<<<<<<<<
@@ -29519,10 +26135,10 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Scorer)), ((PyObject *)__pyx_k_tuple_58), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 194; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__BLEU, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 194; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__BLEU, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 194; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":195
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":195
  * 
  * BLEU = Scorer('IBM_BLEU')
  * QCRI = Scorer('QCRI_BLEU')             # <<<<<<<<<<<<<<
@@ -29531,10 +26147,10 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Scorer)), ((PyObject *)__pyx_k_tuple_59), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 195; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__QCRI, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 195; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__QCRI, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 195; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":196
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":196
  * BLEU = Scorer('IBM_BLEU')
  * QCRI = Scorer('QCRI_BLEU')
  * TER = Scorer('TER')             # <<<<<<<<<<<<<<
@@ -29543,10 +26159,10 @@ PyMODINIT_FUNC PyInit__cdec(void)
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   __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Scorer)), ((PyObject *)__pyx_k_tuple_60), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__TER, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__TER, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 196; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":197
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":197
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  * TER = Scorer('TER')
  * CER = Scorer('CER')             # <<<<<<<<<<<<<<
@@ -29554,17 +26170,17 @@ PyMODINIT_FUNC PyInit__cdec(void)
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   __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Scorer)), ((PyObject *)__pyx_k_tuple_61), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 197; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__CER, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 197; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__CER, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 197; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-  /* "/usr0/home/cdyer/cdec-merge/python/src/mteval.pxi":198
+  /* "/Users/vchahun/Sandbox/cdec/python/src/mteval.pxi":198
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  * CER = Scorer('CER')
  * SSK = Scorer('SSK')             # <<<<<<<<<<<<<<
  */
   __pyx_t_3 = PyObject_Call(((PyObject *)((PyObject*)__pyx_ptype_5_cdec_Scorer)), ((PyObject *)__pyx_k_tuple_62), NULL); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 198; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__SSK, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 198; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__SSK, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[5]; __pyx_lineno = 198; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
   /* "_cdec.pyx":22
@@ -29602,7 +26218,7 @@ PyMODINIT_FUNC PyInit__cdec(void)
   __pyx_t_4 = __Pyx_CreateClass(((PyObject *)__pyx_t_2), ((PyObject *)__pyx_t_3), __pyx_n_s__InvalidConfig, __pyx_n_s__InvalidConfig, __pyx_n_s___cdec); if (unlikely(!__pyx_t_4)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_4);
   __Pyx_DECREF(((PyObject *)__pyx_t_2)); __pyx_t_2 = 0;
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__InvalidConfig, __pyx_t_4) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__InvalidConfig, __pyx_t_4) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 25; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
   __Pyx_DECREF(((PyObject *)__pyx_t_3)); __pyx_t_3 = 0;
 
@@ -29623,7 +26239,7 @@ PyMODINIT_FUNC PyInit__cdec(void)
   __pyx_t_2 = __Pyx_CreateClass(((PyObject *)__pyx_t_4), ((PyObject *)__pyx_t_3), __pyx_n_s__ParseFailed, __pyx_n_s__ParseFailed, __pyx_n_s___cdec); if (unlikely(!__pyx_t_2)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_2);
   __Pyx_DECREF(((PyObject *)__pyx_t_4)); __pyx_t_4 = 0;
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__ParseFailed, __pyx_t_2) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__ParseFailed, __pyx_t_2) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 26; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
   __Pyx_DECREF(((PyObject *)__pyx_t_3)); __pyx_t_3 = 0;
 
@@ -29636,7 +26252,7 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyCFunction_NewEx(&__pyx_mdef_5_cdec_3set_silent, NULL, __pyx_n_s___cdec); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 28; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__set_silent, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 28; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s__set_silent, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 28; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
   /* "_cdec.pyx":32
@@ -29648,7 +26264,7 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyCFunction_NewEx(&__pyx_mdef_5_cdec_5_make_config, NULL, __pyx_n_s___cdec); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_3);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s___make_config, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s___make_config, __pyx_t_3) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 32; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
   /* "_cdec.pyx":1
@@ -29658,15 +26274,15 @@ PyMODINIT_FUNC PyInit__cdec(void)
  */
   __pyx_t_3 = PyDict_New(); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(((PyObject *)__pyx_t_3));
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s____test__, ((PyObject *)__pyx_t_3)) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s____test__, ((PyObject *)__pyx_t_3)) < 0) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 1; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(((PyObject *)__pyx_t_3)); __pyx_t_3 = 0;
 
-  /* "string.from_py":12
+  /* "string.from_py":13
  * 
  * @cname("__pyx_convert_string_from_py_")
  * cdef string __pyx_convert_string_from_py_(object o) except *:             # <<<<<<<<<<<<<<
- *     return string(<char*>o, len(o))
- * 
+ *     cdef Py_ssize_t length
+ *     cdef char* data = __Pyx_PyObject_AsStringAndSize(o, &length)
  */
   goto __pyx_L0;
   __pyx_L1_error:;
@@ -29706,17 +26322,15 @@ end:
 }
 #endif /* CYTHON_REFNANNY */
 
-static PyObject *__Pyx_GetName(PyObject *dict, PyObject *name) {
-    PyObject *result;
-    result = PyObject_GetAttr(dict, name);
-    if (!result) {
-        if (dict != __pyx_b) {
-            PyErr_Clear();
-            result = PyObject_GetAttr(__pyx_b, name);
-        }
-        if (!result) {
-            PyErr_SetObject(PyExc_NameError, name);
-        }
+static PyObject *__Pyx_GetBuiltinName(PyObject *name) {
+    PyObject* result = __Pyx_PyObject_GetAttrStr(__pyx_b, name);
+    if (unlikely(!result)) {
+        PyErr_Format(PyExc_NameError,
+#if PY_MAJOR_VERSION >= 3
+            "name '%U' is not defined", name);
+#else
+            "name '%s' is not defined", PyString_AS_STRING(name));
+#endif
     }
     return result;
 }
@@ -29790,24 +26404,23 @@ static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb,
         }
         value = type;
         #if PY_VERSION_HEX < 0x02050000
-            if (PyInstance_Check(type)) {
-                type = (PyObject*) ((PyInstanceObject*)type)->in_class;
-                Py_INCREF(type);
-            }
-            else {
-                type = 0;
-                PyErr_SetString(PyExc_TypeError,
-                    "raise: exception must be an old-style class or instance");
-                goto raise_error;
-            }
-        #else
-            type = (PyObject*) Py_TYPE(type);
+        if (PyInstance_Check(type)) {
+            type = (PyObject*) ((PyInstanceObject*)type)->in_class;
             Py_INCREF(type);
-            if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
-                PyErr_SetString(PyExc_TypeError,
-                    "raise: exception class must be a subclass of BaseException");
-                goto raise_error;
-            }
+        } else {
+            type = 0;
+            PyErr_SetString(PyExc_TypeError,
+                "raise: exception must be an old-style class or instance");
+            goto raise_error;
+        }
+        #else
+        type = (PyObject*) Py_TYPE(type);
+        Py_INCREF(type);
+        if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
+            PyErr_SetString(PyExc_TypeError,
+                "raise: exception class must be a subclass of BaseException");
+            goto raise_error;
+        }
         #endif
     }
     __Pyx_ErrRestore(type, value, tb);
@@ -29845,8 +26458,7 @@ static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject
         else if (PyTuple_Check(value)) {
             Py_INCREF(value);
             args = value;
-        }
-        else
+        } else
             args = PyTuple_Pack(1, value);
         if (!args)
             goto bad;
@@ -29867,18 +26479,22 @@ static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject
             "raise: exception class must be a subclass of BaseException");
         goto bad;
     }
+#if PY_VERSION_HEX >= 0x03030000
+    if (cause) {
+#else
     if (cause && cause != Py_None) {
+#endif
         PyObject *fixed_cause;
-        if (PyExceptionClass_Check(cause)) {
+        if (cause == Py_None) {
+            fixed_cause = NULL;
+        } else if (PyExceptionClass_Check(cause)) {
             fixed_cause = PyObject_CallObject(cause, NULL);
             if (fixed_cause == NULL)
                 goto bad;
-        }
-        else if (PyExceptionInstance_Check(cause)) {
+        } else if (PyExceptionInstance_Check(cause)) {
             fixed_cause = cause;
             Py_INCREF(fixed_cause);
-        }
-        else {
+        } else {
             PyErr_SetString(PyExc_TypeError,
                             "exception causes must derive from "
                             "BaseException");
@@ -30116,6 +26732,94 @@ bad:
     return -1;
 }
 
+static CYTHON_INLINE PyObject* __Pyx_PyObject_Append(PyObject* L, PyObject* x) {
+    if (likely(PyList_CheckExact(L))) {
+        if (unlikely(__Pyx_PyList_Append(L, x) < 0)) return NULL;
+        Py_INCREF(Py_None);
+        return Py_None; /* this is just to have an accurate signature */
+    } else {
+        return __Pyx_PyObject_CallMethod1(L, __pyx_n_s__append, x);
+    }
+}
+
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Generic(PyObject *o, PyObject* j) {
+    PyObject *r;
+    if (!j) return NULL;
+    r = PyObject_GetItem(o, j);
+    Py_DECREF(j);
+    return r;
+}
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_List_Fast(PyObject *o, Py_ssize_t i,
+                                                              int wraparound, int boundscheck) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    if (wraparound & unlikely(i < 0)) i += PyList_GET_SIZE(o);
+    if ((!boundscheck) || likely((0 <= i) & (i < PyList_GET_SIZE(o)))) {
+        PyObject *r = PyList_GET_ITEM(o, i);
+        Py_INCREF(r);
+        return r;
+    }
+    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
+#else
+    return PySequence_GetItem(o, i);
+#endif
+}
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Tuple_Fast(PyObject *o, Py_ssize_t i,
+                                                              int wraparound, int boundscheck) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    if (wraparound & unlikely(i < 0)) i += PyTuple_GET_SIZE(o);
+    if ((!boundscheck) || likely((0 <= i) & (i < PyTuple_GET_SIZE(o)))) {
+        PyObject *r = PyTuple_GET_ITEM(o, i);
+        Py_INCREF(r);
+        return r;
+    }
+    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
+#else
+    return PySequence_GetItem(o, i);
+#endif
+}
+static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Fast(PyObject *o, Py_ssize_t i,
+                                                     int is_list, int wraparound, int boundscheck) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    if (is_list || PyList_CheckExact(o)) {
+        Py_ssize_t n = ((!wraparound) | likely(i >= 0)) ? i : i + PyList_GET_SIZE(o);
+        if ((!boundscheck) || (likely((n >= 0) & (n < PyList_GET_SIZE(o))))) {
+            PyObject *r = PyList_GET_ITEM(o, n);
+            Py_INCREF(r);
+            return r;
+        }
+    }
+    else if (PyTuple_CheckExact(o)) {
+        Py_ssize_t n = ((!wraparound) | likely(i >= 0)) ? i : i + PyTuple_GET_SIZE(o);
+        if ((!boundscheck) || likely((n >= 0) & (n < PyTuple_GET_SIZE(o)))) {
+            PyObject *r = PyTuple_GET_ITEM(o, n);
+            Py_INCREF(r);
+            return r;
+        }
+    } else {
+        PySequenceMethods *m = Py_TYPE(o)->tp_as_sequence;
+        if (likely(m && m->sq_item)) {
+            if (wraparound && unlikely(i < 0) && likely(m->sq_length)) {
+                Py_ssize_t l = m->sq_length(o);
+                if (likely(l >= 0)) {
+                    i += l;
+                } else {
+                    if (PyErr_ExceptionMatches(PyExc_OverflowError))
+                        PyErr_Clear();
+                    else
+                        return NULL;
+                }
+            }
+            return m->sq_item(o, i);
+        }
+    }
+#else
+    if (is_list || PySequence_Check(o)) {
+        return PySequence_GetItem(o, i);
+    }
+#endif
+    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
+}
+
 static CYTHON_INLINE void __Pyx_RaiseTooManyValuesError(Py_ssize_t expected) {
     PyErr_Format(PyExc_ValueError,
                  "too many values to unpack (expected %" CYTHON_FORMAT_SSIZE_T "d)", expected);
@@ -30172,6 +26876,42 @@ static int __Pyx_IternextUnpackEndCheck(PyObject *retval, Py_ssize_t expected) {
     return 0;
 }
 
+static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name) {
+    PyObject *result;
+#if CYTHON_COMPILING_IN_CPYTHON
+    result = PyDict_GetItem(__pyx_d, name);
+    if (result) {
+        Py_INCREF(result);
+    } else {
+#else
+    result = PyObject_GetItem(__pyx_d, name);
+    if (!result) {
+        PyErr_Clear();
+#endif
+        result = __Pyx_GetBuiltinName(name);
+    }
+    return result;
+}
+
+static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
+                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename) {
+    PyObject *old_exc, *old_val, *old_tb;
+    PyObject *ctx;
+    __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
+    #if PY_MAJOR_VERSION < 3
+    ctx = PyString_FromString(name);
+    #else
+    ctx = PyUnicode_FromString(name);
+    #endif
+    __Pyx_ErrRestore(old_exc, old_val, old_tb);
+    if (!ctx) {
+        PyErr_WriteUnraisable(Py_None);
+    } else {
+        PyErr_WriteUnraisable(ctx);
+        Py_DECREF(ctx);
+    }
+}
+
 static CYTHON_INLINE PyObject *__Pyx_PyIter_Next2(PyObject* iterator, PyObject* defval) {
     PyObject* next;
     iternextfunc iternext = Py_TYPE(iterator)->tp_iternext;
@@ -30209,356 +26949,6 @@ static CYTHON_INLINE PyObject *__Pyx_PyIter_Next2(PyObject* iterator, PyObject*
     return NULL;
 }
 
-static double __Pyx__PyObject_AsDouble(PyObject* obj) {
-    PyObject* float_value;
-#if CYTHON_COMPILING_IN_PYPY
-    float_value = PyNumber_Float(obj);
-#else
-    if (Py_TYPE(obj)->tp_as_number && Py_TYPE(obj)->tp_as_number->nb_float) {
-        return PyFloat_AsDouble(obj);
-    } else if (PyUnicode_CheckExact(obj) || PyBytes_CheckExact(obj)) {
-#if PY_MAJOR_VERSION >= 3
-        float_value = PyFloat_FromString(obj);
-#else
-        float_value = PyFloat_FromString(obj, 0);
-#endif
-    } else {
-        PyObject* args = PyTuple_New(1);
-        if (unlikely(!args)) goto bad;
-        PyTuple_SET_ITEM(args, 0, obj);
-        float_value = PyObject_Call((PyObject*)&PyFloat_Type, args, 0);
-        PyTuple_SET_ITEM(args, 0, 0);
-        Py_DECREF(args);
-    }
-#endif
-    if (likely(float_value)) {
-        double value = PyFloat_AS_DOUBLE(float_value);
-        Py_DECREF(float_value);
-        return value;
-    }
-bad:
-    return (double)-1;
-}
-
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *local_type, *local_value, *local_tb;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    PyThreadState *tstate = PyThreadState_GET();
-    local_type = tstate->curexc_type;
-    local_value = tstate->curexc_value;
-    local_tb = tstate->curexc_traceback;
-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-#else
-    PyErr_Fetch(&local_type, &local_value, &local_tb);
-#endif
-    PyErr_NormalizeException(&local_type, &local_value, &local_tb);
-#if CYTHON_COMPILING_IN_CPYTHON
-    if (unlikely(tstate->curexc_type))
-#else
-    if (unlikely(PyErr_Occurred()))
-#endif
-        goto bad;
-    #if PY_MAJOR_VERSION >= 3
-    if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
-        goto bad;
-    #endif
-    Py_INCREF(local_type);
-    Py_INCREF(local_value);
-    Py_INCREF(local_tb);
-    *type = local_type;
-    *value = local_value;
-    *tb = local_tb;
-#if CYTHON_COMPILING_IN_CPYTHON
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = local_type;
-    tstate->exc_value = local_value;
-    tstate->exc_traceback = local_tb;
-    /* Make sure tstate is in a consistent state when we XDECREF
-       these objects (DECREF may run arbitrary code). */
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-#else
-    PyErr_SetExcInfo(local_type, local_value, local_tb);
-#endif
-    return 0;
-bad:
-    *type = 0;
-    *value = 0;
-    *tb = 0;
-    Py_XDECREF(local_type);
-    Py_XDECREF(local_value);
-    Py_XDECREF(local_tb);
-    return -1;
-}
-
-static CYTHON_INLINE void __Pyx_ExceptionSave(PyObject **type, PyObject **value, PyObject **tb) {
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyThreadState *tstate = PyThreadState_GET();
-    *type = tstate->exc_type;
-    *value = tstate->exc_value;
-    *tb = tstate->exc_traceback;
-    Py_XINCREF(*type);
-    Py_XINCREF(*value);
-    Py_XINCREF(*tb);
-#else
-    PyErr_GetExcInfo(type, value, tb);
-#endif
-}
-static void __Pyx_ExceptionReset(PyObject *type, PyObject *value, PyObject *tb) {
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    PyThreadState *tstate = PyThreadState_GET();
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = type;
-    tstate->exc_value = value;
-    tstate->exc_traceback = tb;
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-#else
-    PyErr_SetExcInfo(type, value, tb);
-#endif
-}
-
-static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
-    PyObject *empty_list = 0;
-    PyObject *module = 0;
-    PyObject *global_dict = 0;
-    PyObject *empty_dict = 0;
-    PyObject *list;
-    #if PY_VERSION_HEX < 0x03030000
-    PyObject *py_import = 0;
-    py_import = __Pyx_GetAttrString(__pyx_b, "__import__");
-    if (!py_import)
-        goto bad;
-    #endif
-    if (from_list)
-        list = from_list;
-    else {
-        empty_list = PyList_New(0);
-        if (!empty_list)
-            goto bad;
-        list = empty_list;
-    }
-    global_dict = PyModule_GetDict(__pyx_m);
-    if (!global_dict)
-        goto bad;
-    empty_dict = PyDict_New();
-    if (!empty_dict)
-        goto bad;
-    #if PY_VERSION_HEX >= 0x02050000
-    {
-        #if PY_MAJOR_VERSION >= 3
-        if (level == -1) {
-            if (strchr(__Pyx_MODULE_NAME, '.')) {
-                #if PY_VERSION_HEX < 0x03030000
-                PyObject *py_level = PyInt_FromLong(1);
-                if (!py_level)
-                    goto bad;
-                module = PyObject_CallFunctionObjArgs(py_import,
-                    name, global_dict, empty_dict, list, py_level, NULL);
-                Py_DECREF(py_level);
-                #else
-                module = PyImport_ImportModuleLevelObject(
-                    name, global_dict, empty_dict, list, 1);
-                #endif
-                if (!module) {
-                    if (!PyErr_ExceptionMatches(PyExc_ImportError))
-                        goto bad;
-                    PyErr_Clear();
-                }
-            }
-            level = 0; /* try absolute import on failure */
-        }
-        #endif
-        if (!module) {
-            #if PY_VERSION_HEX < 0x03030000
-            PyObject *py_level = PyInt_FromLong(level);
-            if (!py_level)
-                goto bad;
-            module = PyObject_CallFunctionObjArgs(py_import,
-                name, global_dict, empty_dict, list, py_level, NULL);
-            Py_DECREF(py_level);
-            #else
-            module = PyImport_ImportModuleLevelObject(
-                name, global_dict, empty_dict, list, level);
-            #endif
-        }
-    }
-    #else
-    if (level>0) {
-        PyErr_SetString(PyExc_RuntimeError, "Relative import is not supported for Python <=2.4.");
-        goto bad;
-    }
-    module = PyObject_CallFunctionObjArgs(py_import,
-        name, global_dict, empty_dict, list, NULL);
-    #endif
-bad:
-    #if PY_VERSION_HEX < 0x03030000
-    Py_XDECREF(py_import);
-    #endif
-    Py_XDECREF(empty_list);
-    Py_XDECREF(empty_dict);
-    return module;
-}
-
-static PyObject *__Pyx_FindPy2Metaclass(PyObject *bases) {
-    PyObject *metaclass;
-#if PY_MAJOR_VERSION < 3
-    if (PyTuple_Check(bases) && PyTuple_GET_SIZE(bases) > 0) {
-        PyObject *base = PyTuple_GET_ITEM(bases, 0);
-        metaclass = PyObject_GetAttrString(base, (char *)"__class__");
-        if (!metaclass) {
-            PyErr_Clear();
-            metaclass = (PyObject*) Py_TYPE(base);
-        }
-    } else {
-        metaclass = (PyObject *) &PyClass_Type;
-    }
-#else
-    if (PyTuple_Check(bases) && PyTuple_GET_SIZE(bases) > 0) {
-        PyObject *base = PyTuple_GET_ITEM(bases, 0);
-        metaclass = (PyObject*) Py_TYPE(base);
-    } else {
-        metaclass = (PyObject *) &PyType_Type;
-    }
-#endif
-    Py_INCREF(metaclass);
-    return metaclass;
-}
-
-static PyObject *__Pyx_CreateClass(PyObject *bases, PyObject *dict, PyObject *name,
-                                   PyObject *qualname, PyObject *modname) {
-    PyObject *result;
-    PyObject *metaclass;
-    if (PyDict_SetItemString(dict, "__module__", modname) < 0)
-        return NULL;
-    if (PyDict_SetItemString(dict, "__qualname__", qualname) < 0)
-        return NULL;
-    metaclass = PyDict_GetItemString(dict, "__metaclass__");
-    if (metaclass) {
-        Py_INCREF(metaclass);
-    } else {
-        metaclass = __Pyx_FindPy2Metaclass(bases);
-    }
-    result = PyObject_CallFunctionObjArgs(metaclass, name, bases, dict, NULL);
-    Py_DECREF(metaclass);
-    return result;
-}
-
-static CYTHON_INLINE WordID __Pyx_PyInt_from_py_WordID(PyObject* x) {
-    const WordID neg_one = (WordID)-1, const_zero = (WordID)0;
-    const int is_unsigned = const_zero < neg_one;
-    if (sizeof(WordID) == sizeof(char)) {
-        if (is_unsigned)
-            return (WordID)__Pyx_PyInt_AsUnsignedChar(x);
-        else
-            return (WordID)__Pyx_PyInt_AsSignedChar(x);
-    } else if (sizeof(WordID) == sizeof(short)) {
-        if (is_unsigned)
-            return (WordID)__Pyx_PyInt_AsUnsignedShort(x);
-        else
-            return (WordID)__Pyx_PyInt_AsSignedShort(x);
-    } else if (sizeof(WordID) == sizeof(int)) {
-        if (is_unsigned)
-            return (WordID)__Pyx_PyInt_AsUnsignedInt(x);
-        else
-            return (WordID)__Pyx_PyInt_AsSignedInt(x);
-    } else if (sizeof(WordID) == sizeof(long)) {
-        if (is_unsigned)
-            return (WordID)__Pyx_PyInt_AsUnsignedLong(x);
-        else
-            return (WordID)__Pyx_PyInt_AsSignedLong(x);
-    } else if (sizeof(WordID) == sizeof(PY_LONG_LONG)) {
-        if (is_unsigned)
-            return (WordID)__Pyx_PyInt_AsUnsignedLongLong(x);
-        else
-            return (WordID)__Pyx_PyInt_AsSignedLongLong(x);
-    }  else {
-        #if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-        PyErr_SetString(PyExc_RuntimeError,
-                        "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-        #else
-        WordID val;
-        PyObject *v = __Pyx_PyNumber_Int(x);
-        #if PY_VERSION_HEX < 0x03000000
-        if (likely(v) && !PyLong_Check(v)) {
-            PyObject *tmp = v;
-            v = PyNumber_Long(tmp);
-            Py_DECREF(tmp);
-        }
-        #endif
-        if (likely(v)) {
-            int one = 1; int is_little = (int)*(unsigned char *)&one;
-            unsigned char *bytes = (unsigned char *)&val;
-            int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                          bytes, sizeof(val),
-                                          is_little, !is_unsigned);
-            Py_DECREF(v);
-            if (likely(!ret))
-                return val;
-        }
-        #endif
-        return (WordID)-1;
-    }
-}
-
-static PyObject* __Pyx_Globals(void) {
-    Py_ssize_t i;
-    PyObject *names = NULL;
-    PyObject *globals = PyObject_GetAttrString(__pyx_m, "__dict__");
-    if (!globals) {
-        PyErr_SetString(PyExc_TypeError,
-            "current module must have __dict__ attribute");
-        goto bad;
-    }
-    names = PyObject_Dir(__pyx_m);
-    if (!names)
-        goto bad;
-    for (i = PyList_GET_SIZE(names)-1; i >= 0; i--) {
-#if CYTHON_COMPILING_IN_PYPY
-        PyObject* name = PySequence_GetItem(names, i);
-        if (!name)
-            goto bad;
-#else
-        PyObject* name = PyList_GET_ITEM(names, i);
-#endif
-        if (!PyDict_Contains(globals, name)) {
-            PyObject* value = PyObject_GetAttr(__pyx_m, name);
-            if (!value) {
-#if CYTHON_COMPILING_IN_PYPY
-                Py_DECREF(name);
-#endif
-                goto bad;
-            }
-            if (PyDict_SetItem(globals, name, value) < 0) {
-#if CYTHON_COMPILING_IN_PYPY
-                Py_DECREF(name);
-#endif
-                Py_DECREF(value);
-                goto bad;
-            }
-        }
-#if CYTHON_COMPILING_IN_PYPY
-        Py_DECREF(name);
-#endif
-    }
-    Py_DECREF(names);
-    return globals;
-bad:
-    Py_XDECREF(names);
-    Py_XDECREF(globals);
-    return NULL;
-}
-
 static PyObject *
 __Pyx_CyFunction_get_doc(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *closure)
 {
@@ -30710,23 +27100,104 @@ __Pyx_CyFunction_get_code(__pyx_CyFunctionObject *op)
     Py_INCREF(result);
     return result;
 }
+static int
+__Pyx_CyFunction_init_defaults(__pyx_CyFunctionObject *op) {
+    PyObject *res = op->defaults_getter((PyObject *) op);
+    if (unlikely(!res))
+        return -1;
+    op->defaults_tuple = PyTuple_GET_ITEM(res, 0);
+    Py_INCREF(op->defaults_tuple);
+    op->defaults_kwdict = PyTuple_GET_ITEM(res, 1);
+    Py_INCREF(op->defaults_kwdict);
+    Py_DECREF(res);
+    return 0;
+}
+static int
+__Pyx_CyFunction_set_defaults(__pyx_CyFunctionObject *op, PyObject* value) {
+    PyObject* tmp;
+    if (!value) {
+        value = Py_None;
+    } else if (value != Py_None && !PyTuple_Check(value)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "__defaults__ must be set to a tuple object");
+        return -1;
+    }
+    Py_INCREF(value);
+    tmp = op->defaults_tuple;
+    op->defaults_tuple = value;
+    Py_XDECREF(tmp);
+    return 0;
+}
 static PyObject *
-__Pyx_CyFunction_get_defaults(__pyx_CyFunctionObject *op)
-{
-    if (op->defaults_tuple) {
-        Py_INCREF(op->defaults_tuple);
-        return op->defaults_tuple;
+__Pyx_CyFunction_get_defaults(__pyx_CyFunctionObject *op) {
+    PyObject* result = op->defaults_tuple;
+    if (unlikely(!result)) {
+        if (op->defaults_getter) {
+            if (__Pyx_CyFunction_init_defaults(op) < 0) return NULL;
+            result = op->defaults_tuple;
+        } else {
+            result = Py_None;
+        }
     }
-    if (op->defaults_getter) {
-        PyObject *res = op->defaults_getter((PyObject *) op);
-        if (likely(res)) {
-            Py_INCREF(res);
-            op->defaults_tuple = res;
+    Py_INCREF(result);
+    return result;
+}
+static int
+__Pyx_CyFunction_set_kwdefaults(__pyx_CyFunctionObject *op, PyObject* value) {
+    PyObject* tmp;
+    if (!value) {
+        value = Py_None;
+    } else if (value != Py_None && !PyDict_Check(value)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "__kwdefaults__ must be set to a dict object");
+        return -1;
+    }
+    Py_INCREF(value);
+    tmp = op->defaults_kwdict;
+    op->defaults_kwdict = value;
+    Py_XDECREF(tmp);
+    return 0;
+}
+static PyObject *
+__Pyx_CyFunction_get_kwdefaults(__pyx_CyFunctionObject *op) {
+    PyObject* result = op->defaults_kwdict;
+    if (unlikely(!result)) {
+        if (op->defaults_getter) {
+            if (__Pyx_CyFunction_init_defaults(op) < 0) return NULL;
+            result = op->defaults_kwdict;
+        } else {
+            result = Py_None;
         }
-        return res;
     }
-    Py_INCREF(Py_None);
-    return Py_None;
+    Py_INCREF(result);
+    return result;
+}
+static int
+__Pyx_CyFunction_set_annotations(__pyx_CyFunctionObject *op, PyObject* value) {
+    PyObject* tmp;
+    if (!value || value == Py_None) {
+        value = NULL;
+    } else if (!PyDict_Check(value)) {
+        PyErr_SetString(PyExc_TypeError,
+                        "__annotations__ must be set to a dict object");
+        return -1;
+    }
+    Py_XINCREF(value);
+    tmp = op->func_annotations;
+    op->func_annotations = value;
+    Py_XDECREF(tmp);
+    return 0;
+}
+static PyObject *
+__Pyx_CyFunction_get_annotations(__pyx_CyFunctionObject *op) {
+    PyObject* result = op->func_annotations;
+    if (unlikely(!result)) {
+        result = PyDict_New();
+        if (unlikely(!result)) return NULL;
+        op->func_annotations = result;
+    }
+    Py_INCREF(result);
+    return result;
 }
 static PyGetSetDef __pyx_CyFunction_getsets[] = {
     {(char *) "func_doc", (getter)__Pyx_CyFunction_get_doc, (setter)__Pyx_CyFunction_set_doc, 0, 0},
@@ -30743,8 +27214,10 @@ static PyGetSetDef __pyx_CyFunction_getsets[] = {
     {(char *) "__closure__", (getter)__Pyx_CyFunction_get_closure, 0, 0, 0},
     {(char *) "func_code", (getter)__Pyx_CyFunction_get_code, 0, 0, 0},
     {(char *) "__code__", (getter)__Pyx_CyFunction_get_code, 0, 0, 0},
-    {(char *) "func_defaults", (getter)__Pyx_CyFunction_get_defaults, 0, 0, 0},
-    {(char *) "__defaults__", (getter)__Pyx_CyFunction_get_defaults, 0, 0, 0},
+    {(char *) "func_defaults", (getter)__Pyx_CyFunction_get_defaults, (setter)__Pyx_CyFunction_set_defaults, 0, 0},
+    {(char *) "__defaults__", (getter)__Pyx_CyFunction_get_defaults, (setter)__Pyx_CyFunction_set_defaults, 0, 0},
+    {(char *) "__kwdefaults__", (getter)__Pyx_CyFunction_get_kwdefaults, (setter)__Pyx_CyFunction_set_kwdefaults, 0, 0},
+    {(char *) "__annotations__", (getter)__Pyx_CyFunction_get_annotations, (setter)__Pyx_CyFunction_set_annotations, 0, 0},
     {0, 0, 0, 0, 0}
 };
 #ifndef PY_WRITE_RESTRICTED /* < Py2.5 */
@@ -30791,7 +27264,9 @@ static PyObject *__Pyx_CyFunction_New(PyTypeObject *type, PyMethodDef *ml, int f
     op->defaults_pyobjects = 0;
     op->defaults = NULL;
     op->defaults_tuple = NULL;
+    op->defaults_kwdict = NULL;
     op->defaults_getter = NULL;
+    op->func_annotations = NULL;
     PyObject_GC_Track(op);
     return (PyObject *) op;
 }
@@ -30807,6 +27282,8 @@ __Pyx_CyFunction_clear(__pyx_CyFunctionObject *m)
     Py_CLEAR(m->func_code);
     Py_CLEAR(m->func_classobj);
     Py_CLEAR(m->defaults_tuple);
+    Py_CLEAR(m->defaults_kwdict);
+    Py_CLEAR(m->func_annotations);
     if (m->defaults) {
         PyObject **pydefaults = __Pyx_CyFunction_Defaults(PyObject *, m);
         int i;
@@ -30836,6 +27313,7 @@ static int __Pyx_CyFunction_traverse(__pyx_CyFunctionObject *m, visitproc visit,
     Py_VISIT(m->func_code);
     Py_VISIT(m->func_classobj);
     Py_VISIT(m->defaults_tuple);
+    Py_VISIT(m->defaults_kwdict);
     if (m->defaults) {
         PyObject **pydefaults = __Pyx_CyFunction_Defaults(PyObject *, m);
         int i;
@@ -30991,7 +27469,7 @@ static CYTHON_INLINE void *__Pyx_CyFunction_InitDefaults(PyObject *func, size_t
     m->defaults = PyMem_Malloc(size);
     if (!m->defaults)
         return PyErr_NoMemory();
-    memset(m->defaults, 0, sizeof(size));
+    memset(m->defaults, 0, size);
     m->defaults_pyobjects = pyobjects;
     return m->defaults;
 }
@@ -31000,6 +27478,437 @@ static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsTuple(PyObject *func, PyOb
     m->defaults_tuple = tuple;
     Py_INCREF(tuple);
 }
+static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsKwDict(PyObject *func, PyObject *dict) {
+    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
+    m->defaults_kwdict = dict;
+    Py_INCREF(dict);
+}
+static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *func, PyObject *dict) {
+    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
+    m->func_annotations = dict;
+    Py_INCREF(dict);
+}
+
+static PyObject* __Pyx_PyDict_GetItemDefault(PyObject* d, PyObject* key, PyObject* default_value) {
+    PyObject* value;
+#if PY_MAJOR_VERSION >= 3
+    value = PyDict_GetItemWithError(d, key);
+    if (unlikely(!value)) {
+        if (unlikely(PyErr_Occurred()))
+            return NULL;
+        value = default_value;
+    }
+    Py_INCREF(value);
+#else
+    if (PyString_CheckExact(key) || PyUnicode_CheckExact(key) || PyInt_CheckExact(key)) {
+        value = PyDict_GetItem(d, key);
+        if (unlikely(!value)) {
+            value = default_value;
+        }
+        Py_INCREF(value);
+    } else {
+        if (default_value == Py_None)
+            default_value = NULL;
+        value = PyObject_CallMethodObjArgs(
+            d, __pyx_n_s__get, key, default_value, NULL);
+    }
+#endif
+    return value;
+}
+
+static double __Pyx__PyObject_AsDouble(PyObject* obj) {
+    PyObject* float_value;
+#if CYTHON_COMPILING_IN_PYPY
+    float_value = PyNumber_Float(obj);
+#else
+    PyNumberMethods *nb = Py_TYPE(obj)->tp_as_number;
+    if (likely(nb) && likely(nb->nb_float)) {
+        float_value = nb->nb_float(obj);
+        if (likely(float_value) && unlikely(!PyFloat_Check(float_value))) {
+            PyErr_Format(PyExc_TypeError,
+                "__float__ returned non-float (type %.200s)",
+                Py_TYPE(float_value)->tp_name);
+            Py_DECREF(float_value);
+            goto bad;
+        }
+    } else if (PyUnicode_CheckExact(obj) || PyBytes_CheckExact(obj)) {
+#if PY_MAJOR_VERSION >= 3
+        float_value = PyFloat_FromString(obj);
+#else
+        float_value = PyFloat_FromString(obj, 0);
+#endif
+    } else {
+        PyObject* args = PyTuple_New(1);
+        if (unlikely(!args)) goto bad;
+        PyTuple_SET_ITEM(args, 0, obj);
+        float_value = PyObject_Call((PyObject*)&PyFloat_Type, args, 0);
+        PyTuple_SET_ITEM(args, 0, 0);
+        Py_DECREF(args);
+    }
+#endif
+    if (likely(float_value)) {
+        double value = PyFloat_AS_DOUBLE(float_value);
+        Py_DECREF(float_value);
+        return value;
+    }
+bad:
+    return (double)-1;
+}
+
+static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb) {
+    PyObject *local_type, *local_value, *local_tb;
+#if CYTHON_COMPILING_IN_CPYTHON
+    PyObject *tmp_type, *tmp_value, *tmp_tb;
+    PyThreadState *tstate = PyThreadState_GET();
+    local_type = tstate->curexc_type;
+    local_value = tstate->curexc_value;
+    local_tb = tstate->curexc_traceback;
+    tstate->curexc_type = 0;
+    tstate->curexc_value = 0;
+    tstate->curexc_traceback = 0;
+#else
+    PyErr_Fetch(&local_type, &local_value, &local_tb);
+#endif
+    PyErr_NormalizeException(&local_type, &local_value, &local_tb);
+#if CYTHON_COMPILING_IN_CPYTHON
+    if (unlikely(tstate->curexc_type))
+#else
+    if (unlikely(PyErr_Occurred()))
+#endif
+        goto bad;
+    #if PY_MAJOR_VERSION >= 3
+    if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
+        goto bad;
+    #endif
+    Py_INCREF(local_type);
+    Py_INCREF(local_value);
+    Py_INCREF(local_tb);
+    *type = local_type;
+    *value = local_value;
+    *tb = local_tb;
+#if CYTHON_COMPILING_IN_CPYTHON
+    tmp_type = tstate->exc_type;
+    tmp_value = tstate->exc_value;
+    tmp_tb = tstate->exc_traceback;
+    tstate->exc_type = local_type;
+    tstate->exc_value = local_value;
+    tstate->exc_traceback = local_tb;
+    /* Make sure tstate is in a consistent state when we XDECREF
+       these objects (DECREF may run arbitrary code). */
+    Py_XDECREF(tmp_type);
+    Py_XDECREF(tmp_value);
+    Py_XDECREF(tmp_tb);
+#else
+    PyErr_SetExcInfo(local_type, local_value, local_tb);
+#endif
+    return 0;
+bad:
+    *type = 0;
+    *value = 0;
+    *tb = 0;
+    Py_XDECREF(local_type);
+    Py_XDECREF(local_value);
+    Py_XDECREF(local_tb);
+    return -1;
+}
+
+static int __Pyx_SetVtable(PyObject *dict, void *vtable) {
+#if PY_VERSION_HEX >= 0x02070000 && !(PY_MAJOR_VERSION==3&&PY_MINOR_VERSION==0)
+    PyObject *ob = PyCapsule_New(vtable, 0, 0);
+#else
+    PyObject *ob = PyCObject_FromVoidPtr(vtable, 0);
+#endif
+    if (!ob)
+        goto bad;
+    if (PyDict_SetItem(dict, __pyx_n_s____pyx_vtable__, ob) < 0)
+        goto bad;
+    Py_DECREF(ob);
+    return 0;
+bad:
+    Py_XDECREF(ob);
+    return -1;
+}
+
+static void* __Pyx_GetVtable(PyObject *dict) {
+    void* ptr;
+    PyObject *ob = PyObject_GetItem(dict, __pyx_n_s____pyx_vtable__);
+    if (!ob)
+        goto bad;
+#if PY_VERSION_HEX >= 0x02070000 && !(PY_MAJOR_VERSION==3&&PY_MINOR_VERSION==0)
+    ptr = PyCapsule_GetPointer(ob, 0);
+#else
+    ptr = PyCObject_AsVoidPtr(ob);
+#endif
+    if (!ptr && !PyErr_Occurred())
+        PyErr_SetString(PyExc_RuntimeError, "invalid vtable found for imported type");
+    Py_DECREF(ob);
+    return ptr;
+bad:
+    Py_XDECREF(ob);
+    return NULL;
+}
+
+static CYTHON_INLINE void __Pyx_ExceptionSave(PyObject **type, PyObject **value, PyObject **tb) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    PyThreadState *tstate = PyThreadState_GET();
+    *type = tstate->exc_type;
+    *value = tstate->exc_value;
+    *tb = tstate->exc_traceback;
+    Py_XINCREF(*type);
+    Py_XINCREF(*value);
+    Py_XINCREF(*tb);
+#else
+    PyErr_GetExcInfo(type, value, tb);
+#endif
+}
+static void __Pyx_ExceptionReset(PyObject *type, PyObject *value, PyObject *tb) {
+#if CYTHON_COMPILING_IN_CPYTHON
+    PyObject *tmp_type, *tmp_value, *tmp_tb;
+    PyThreadState *tstate = PyThreadState_GET();
+    tmp_type = tstate->exc_type;
+    tmp_value = tstate->exc_value;
+    tmp_tb = tstate->exc_traceback;
+    tstate->exc_type = type;
+    tstate->exc_value = value;
+    tstate->exc_traceback = tb;
+    Py_XDECREF(tmp_type);
+    Py_XDECREF(tmp_value);
+    Py_XDECREF(tmp_tb);
+#else
+    PyErr_SetExcInfo(type, value, tb);
+#endif
+}
+
+static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
+    PyObject *empty_list = 0;
+    PyObject *module = 0;
+    PyObject *global_dict = 0;
+    PyObject *empty_dict = 0;
+    PyObject *list;
+    #if PY_VERSION_HEX < 0x03030000
+    PyObject *py_import;
+    py_import = __Pyx_PyObject_GetAttrStr(__pyx_b, __pyx_n_s____import__);
+    if (!py_import)
+        goto bad;
+    #endif
+    if (from_list)
+        list = from_list;
+    else {
+        empty_list = PyList_New(0);
+        if (!empty_list)
+            goto bad;
+        list = empty_list;
+    }
+    global_dict = PyModule_GetDict(__pyx_m);
+    if (!global_dict)
+        goto bad;
+    empty_dict = PyDict_New();
+    if (!empty_dict)
+        goto bad;
+    #if PY_VERSION_HEX >= 0x02050000
+    {
+        #if PY_MAJOR_VERSION >= 3
+        if (level == -1) {
+            if (strchr(__Pyx_MODULE_NAME, '.')) {
+                #if PY_VERSION_HEX < 0x03030000
+                PyObject *py_level = PyInt_FromLong(1);
+                if (!py_level)
+                    goto bad;
+                module = PyObject_CallFunctionObjArgs(py_import,
+                    name, global_dict, empty_dict, list, py_level, NULL);
+                Py_DECREF(py_level);
+                #else
+                module = PyImport_ImportModuleLevelObject(
+                    name, global_dict, empty_dict, list, 1);
+                #endif
+                if (!module) {
+                    if (!PyErr_ExceptionMatches(PyExc_ImportError))
+                        goto bad;
+                    PyErr_Clear();
+                }
+            }
+            level = 0; /* try absolute import on failure */
+        }
+        #endif
+        if (!module) {
+            #if PY_VERSION_HEX < 0x03030000
+            PyObject *py_level = PyInt_FromLong(level);
+            if (!py_level)
+                goto bad;
+            module = PyObject_CallFunctionObjArgs(py_import,
+                name, global_dict, empty_dict, list, py_level, NULL);
+            Py_DECREF(py_level);
+            #else
+            module = PyImport_ImportModuleLevelObject(
+                name, global_dict, empty_dict, list, level);
+            #endif
+        }
+    }
+    #else
+    if (level>0) {
+        PyErr_SetString(PyExc_RuntimeError, "Relative import is not supported for Python <=2.4.");
+        goto bad;
+    }
+    module = PyObject_CallFunctionObjArgs(py_import,
+        name, global_dict, empty_dict, list, NULL);
+    #endif
+bad:
+    #if PY_VERSION_HEX < 0x03030000
+    Py_XDECREF(py_import);
+    #endif
+    Py_XDECREF(empty_list);
+    Py_XDECREF(empty_dict);
+    return module;
+}
+
+static PyObject *__Pyx_FindPy2Metaclass(PyObject *bases) {
+    PyObject *metaclass;
+#if PY_MAJOR_VERSION < 3
+    if (PyTuple_Check(bases) && PyTuple_GET_SIZE(bases) > 0) {
+        PyObject *base = PyTuple_GET_ITEM(bases, 0);
+        metaclass = __Pyx_PyObject_GetAttrStr(base, __pyx_n_s____class__);
+        if (!metaclass) {
+            PyErr_Clear();
+            metaclass = (PyObject*) Py_TYPE(base);
+        }
+    } else {
+        metaclass = (PyObject *) &PyClass_Type;
+    }
+#else
+    if (PyTuple_Check(bases) && PyTuple_GET_SIZE(bases) > 0) {
+        PyObject *base = PyTuple_GET_ITEM(bases, 0);
+        metaclass = (PyObject*) Py_TYPE(base);
+    } else {
+        metaclass = (PyObject *) &PyType_Type;
+    }
+#endif
+    Py_INCREF(metaclass);
+    return metaclass;
+}
+
+static PyObject *__Pyx_CreateClass(PyObject *bases, PyObject *dict, PyObject *name,
+                                   PyObject *qualname, PyObject *modname) {
+    PyObject *result;
+    PyObject *metaclass;
+    if (PyDict_SetItem(dict, __pyx_n_s____module__, modname) < 0)
+        return NULL;
+    if (PyDict_SetItem(dict, __pyx_n_s____qualname__, qualname) < 0)
+        return NULL;
+    metaclass = PyDict_GetItem(dict, __pyx_n_s____metaclass__);
+    if (metaclass) {
+        Py_INCREF(metaclass);
+    } else {
+        metaclass = __Pyx_FindPy2Metaclass(bases);
+    }
+    result = PyObject_CallFunctionObjArgs(metaclass, name, bases, dict, NULL);
+    Py_DECREF(metaclass);
+    return result;
+}
+
+static CYTHON_INLINE WordID __Pyx_PyInt_from_py_WordID(PyObject* x) {
+    const WordID neg_one = (WordID)-1, const_zero = (WordID)0;
+    const int is_unsigned = const_zero < neg_one;
+    if (sizeof(WordID) == sizeof(char)) {
+        if (is_unsigned)
+            return (WordID)__Pyx_PyInt_AsUnsignedChar(x);
+        else
+            return (WordID)__Pyx_PyInt_AsSignedChar(x);
+    } else if (sizeof(WordID) == sizeof(short)) {
+        if (is_unsigned)
+            return (WordID)__Pyx_PyInt_AsUnsignedShort(x);
+        else
+            return (WordID)__Pyx_PyInt_AsSignedShort(x);
+    } else if (sizeof(WordID) == sizeof(int)) {
+        if (is_unsigned)
+            return (WordID)__Pyx_PyInt_AsUnsignedInt(x);
+        else
+            return (WordID)__Pyx_PyInt_AsSignedInt(x);
+    } else if (sizeof(WordID) == sizeof(long)) {
+        if (is_unsigned)
+            return (WordID)__Pyx_PyInt_AsUnsignedLong(x);
+        else
+            return (WordID)__Pyx_PyInt_AsSignedLong(x);
+    } else if (sizeof(WordID) == sizeof(PY_LONG_LONG)) {
+        if (is_unsigned)
+            return (WordID)__Pyx_PyInt_AsUnsignedLongLong(x);
+        else
+            return (WordID)__Pyx_PyInt_AsSignedLongLong(x);
+    }  else {
+        #if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
+        PyErr_SetString(PyExc_RuntimeError,
+                        "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
+        #else
+        WordID val;
+        PyObject *v = __Pyx_PyNumber_Int(x);
+        #if PY_MAJOR_VERSION < 3
+        if (likely(v) && !PyLong_Check(v)) {
+            PyObject *tmp = v;
+            v = PyNumber_Long(tmp);
+            Py_DECREF(tmp);
+        }
+        #endif
+        if (likely(v)) {
+            int one = 1; int is_little = (int)*(unsigned char *)&one;
+            unsigned char *bytes = (unsigned char *)&val;
+            int ret = _PyLong_AsByteArray((PyLongObject *)v,
+                                          bytes, sizeof(val),
+                                          is_little, !is_unsigned);
+            Py_DECREF(v);
+            if (likely(!ret))
+                return val;
+        }
+        #endif
+        return (WordID)-1;
+    }
+}
+
+static PyObject* __Pyx_Globals(void) {
+    Py_ssize_t i;
+    PyObject *names = NULL;
+    PyObject *globals = PyObject_GetAttr(__pyx_m, __pyx_n_s____dict__);
+    if (!globals) {
+        PyErr_SetString(PyExc_TypeError,
+            "current module must have __dict__ attribute");
+        goto bad;
+    }
+    names = PyObject_Dir(__pyx_m);
+    if (!names)
+        goto bad;
+    for (i = PyList_GET_SIZE(names)-1; i >= 0; i--) {
+#if CYTHON_COMPILING_IN_PYPY
+        PyObject* name = PySequence_GetItem(names, i);
+        if (!name)
+            goto bad;
+#else
+        PyObject* name = PyList_GET_ITEM(names, i);
+#endif
+        if (!PyDict_Contains(globals, name)) {
+            PyObject* value = PyObject_GetAttr(__pyx_m, name);
+            if (!value) {
+#if CYTHON_COMPILING_IN_PYPY
+                Py_DECREF(name);
+#endif
+                goto bad;
+            }
+            if (PyDict_SetItem(globals, name, value) < 0) {
+#if CYTHON_COMPILING_IN_PYPY
+                Py_DECREF(name);
+#endif
+                Py_DECREF(value);
+                goto bad;
+            }
+        }
+#if CYTHON_COMPILING_IN_PYPY
+        Py_DECREF(name);
+#endif
+    }
+    Py_DECREF(names);
+    return globals;
+bad:
+    Py_XDECREF(names);
+    Py_XDECREF(globals);
+    return NULL;
+}
 
 static CYTHON_INLINE unsigned char __Pyx_PyInt_AsUnsignedChar(PyObject* x) {
     const unsigned char neg_one = (unsigned char)-1, const_zero = 0;
@@ -31191,10 +28100,15 @@ static CYTHON_INLINE int __Pyx_PyInt_AsLongDouble(PyObject* x) {
     return (int)__Pyx_PyInt_AsLong(x);
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE unsigned long __Pyx_PyInt_AsUnsignedLong(PyObject* x) {
     const unsigned long neg_one = (unsigned long)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31207,6 +28121,16 @@ static CYTHON_INLINE unsigned long __Pyx_PyInt_AsUnsignedLong(PyObject* x) {
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(unsigned long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (unsigned long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to unsigned long");
@@ -31214,6 +28138,17 @@ static CYTHON_INLINE unsigned long __Pyx_PyInt_AsUnsignedLong(PyObject* x) {
             }
             return (unsigned long)PyLong_AsUnsignedLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(unsigned long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(unsigned long) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(unsigned long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (unsigned long)PyLong_AsLong(x);
         }
     } else {
@@ -31226,10 +28161,15 @@ static CYTHON_INLINE unsigned long __Pyx_PyInt_AsUnsignedLong(PyObject* x) {
     }
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE unsigned PY_LONG_LONG __Pyx_PyInt_AsUnsignedLongLong(PyObject* x) {
     const unsigned PY_LONG_LONG neg_one = (unsigned PY_LONG_LONG)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31242,6 +28182,16 @@ static CYTHON_INLINE unsigned PY_LONG_LONG __Pyx_PyInt_AsUnsignedLongLong(PyObje
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(unsigned PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (unsigned PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to unsigned PY_LONG_LONG");
@@ -31249,6 +28199,17 @@ static CYTHON_INLINE unsigned PY_LONG_LONG __Pyx_PyInt_AsUnsignedLongLong(PyObje
             }
             return (unsigned PY_LONG_LONG)PyLong_AsUnsignedLongLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(unsigned PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(unsigned PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(unsigned PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (unsigned PY_LONG_LONG)PyLong_AsLongLong(x);
         }
     } else {
@@ -31261,10 +28222,15 @@ static CYTHON_INLINE unsigned PY_LONG_LONG __Pyx_PyInt_AsUnsignedLongLong(PyObje
     }
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE long __Pyx_PyInt_AsLong(PyObject* x) {
     const long neg_one = (long)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31277,6 +28243,16 @@ static CYTHON_INLINE long __Pyx_PyInt_AsLong(PyObject* x) {
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to long");
@@ -31284,6 +28260,17 @@ static CYTHON_INLINE long __Pyx_PyInt_AsLong(PyObject* x) {
             }
             return (long)PyLong_AsUnsignedLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(long) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (long)PyLong_AsLong(x);
         }
     } else {
@@ -31296,10 +28283,15 @@ static CYTHON_INLINE long __Pyx_PyInt_AsLong(PyObject* x) {
     }
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE PY_LONG_LONG __Pyx_PyInt_AsLongLong(PyObject* x) {
     const PY_LONG_LONG neg_one = (PY_LONG_LONG)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31312,6 +28304,16 @@ static CYTHON_INLINE PY_LONG_LONG __Pyx_PyInt_AsLongLong(PyObject* x) {
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to PY_LONG_LONG");
@@ -31319,6 +28321,17 @@ static CYTHON_INLINE PY_LONG_LONG __Pyx_PyInt_AsLongLong(PyObject* x) {
             }
             return (PY_LONG_LONG)PyLong_AsUnsignedLongLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (PY_LONG_LONG)PyLong_AsLongLong(x);
         }
     } else {
@@ -31331,10 +28344,15 @@ static CYTHON_INLINE PY_LONG_LONG __Pyx_PyInt_AsLongLong(PyObject* x) {
     }
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE signed long __Pyx_PyInt_AsSignedLong(PyObject* x) {
     const signed long neg_one = (signed long)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31347,6 +28365,16 @@ static CYTHON_INLINE signed long __Pyx_PyInt_AsSignedLong(PyObject* x) {
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(signed long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (signed long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to signed long");
@@ -31354,6 +28382,17 @@ static CYTHON_INLINE signed long __Pyx_PyInt_AsSignedLong(PyObject* x) {
             }
             return (signed long)PyLong_AsUnsignedLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(signed long)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(signed long) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(signed long) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (signed long)PyLong_AsLong(x);
         }
     } else {
@@ -31366,10 +28405,15 @@ static CYTHON_INLINE signed long __Pyx_PyInt_AsSignedLong(PyObject* x) {
     }
 }
 
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+#include "longintrepr.h"
+#endif
+#endif
 static CYTHON_INLINE signed PY_LONG_LONG __Pyx_PyInt_AsSignedLongLong(PyObject* x) {
     const signed PY_LONG_LONG neg_one = (signed PY_LONG_LONG)-1, const_zero = 0;
     const int is_unsigned = neg_one > const_zero;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (likely(PyInt_Check(x))) {
         long val = PyInt_AS_LONG(x);
         if (is_unsigned && unlikely(val < 0)) {
@@ -31382,6 +28426,16 @@ static CYTHON_INLINE signed PY_LONG_LONG __Pyx_PyInt_AsSignedLongLong(PyObject*
 #endif
     if (likely(PyLong_Check(x))) {
         if (is_unsigned) {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(signed PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return (signed PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             if (unlikely(Py_SIZE(x) < 0)) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "can't convert negative value to signed PY_LONG_LONG");
@@ -31389,6 +28443,17 @@ static CYTHON_INLINE signed PY_LONG_LONG __Pyx_PyInt_AsSignedLongLong(PyObject*
             }
             return (signed PY_LONG_LONG)PyLong_AsUnsignedLongLong(x);
         } else {
+#if CYTHON_COMPILING_IN_CPYTHON && PY_MAJOR_VERSION >= 3
+#if CYTHON_USE_PYLONG_INTERNALS
+            if (sizeof(digit) <= sizeof(signed PY_LONG_LONG)) {
+                switch (Py_SIZE(x)) {
+                    case  0: return 0;
+                    case  1: return +(signed PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                    case -1: return -(signed PY_LONG_LONG) ((PyLongObject*)x)->ob_digit[0];
+                }
+            }
+#endif
+#endif
             return (signed PY_LONG_LONG)PyLong_AsLongLong(x);
         }
     } else {
@@ -31469,7 +28534,7 @@ static int __Pyx_PyGen_FetchStopIterationValue(PyObject **pvalue) {
     Py_DECREF(ev);
 #else
     {
-        PyObject* args = PyObject_GetAttrString(ev, "args");
+        PyObject* args = PyObject_GetAttr(ev, __pyx_n_s__args);
         Py_DECREF(ev);
         if (likely(args)) {
             value = PyObject_GetItem(args, 0);
@@ -31605,7 +28670,7 @@ static PyObject *__Pyx_Generator_Send(PyObject *self, PyObject *value) {
             if (value == Py_None)
                 ret = PyIter_Next(yf);
             else
-                ret = PyObject_CallMethod(yf, (char*)"send", (char*)"O", value);
+                ret = __Pyx_PyObject_CallMethod1(yf, __pyx_n_s__send, value);
         }
         gen->is_running = 0;
         if (likely(ret)) {
@@ -31625,7 +28690,7 @@ static int __Pyx_Generator_CloseIter(__pyx_GeneratorObject *gen, PyObject *yf) {
     } else {
         PyObject *meth;
         gen->is_running = 1;
-        meth = PyObject_GetAttrString(yf, "close");
+        meth = PyObject_GetAttr(yf, __pyx_n_s__close);
         if (unlikely(!meth)) {
             if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
                 PyErr_WriteUnraisable(yf);
@@ -31710,7 +28775,7 @@ static PyObject *__Pyx_Generator_Throw(PyObject *self, PyObject *args) {
         if (__Pyx_Generator_CheckExact(yf)) {
             ret = __Pyx_Generator_Throw(yf, args);
         } else {
-            PyObject *meth = PyObject_GetAttrString(yf, "throw");
+            PyObject *meth = PyObject_GetAttr(yf, __pyx_n_s__throw);
             if (unlikely(!meth)) {
                 Py_DECREF(yf);
                 if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
@@ -31800,7 +28865,7 @@ static void __Pyx_Generator_del(PyObject *self) {
         _Py_NewReference(self);
         self->ob_refcnt = refcnt;
     }
-#if CYTHON_COMPILING_FOR_CPYTHON
+#if CYTHON_COMPILING_IN_CPYTHON
     assert(PyType_IS_GC(self->ob_type) &&
            _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);
     /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so
@@ -31921,25 +28986,6 @@ static int __pyx_Generator_init(void) {
     return 0;
 }
 
-static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
-                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename) {
-    PyObject *old_exc, *old_val, *old_tb;
-    PyObject *ctx;
-    __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
-    #if PY_MAJOR_VERSION < 3
-    ctx = PyString_FromString(name);
-    #else
-    ctx = PyUnicode_FromString(name);
-    #endif
-    __Pyx_ErrRestore(old_exc, old_val, old_tb);
-    if (!ctx) {
-        PyErr_WriteUnraisable(Py_None);
-    } else {
-        PyErr_WriteUnraisable(ctx);
-        Py_DECREF(ctx);
-    }
-}
-
 static int __Pyx_check_binary_version(void) {
     char ctversion[4], rtversion[4];
     PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
@@ -31959,23 +29005,6 @@ static int __Pyx_check_binary_version(void) {
     return 0;
 }
 
-static int __Pyx_SetVtable(PyObject *dict, void *vtable) {
-#if PY_VERSION_HEX >= 0x02070000 && !(PY_MAJOR_VERSION==3&&PY_MINOR_VERSION==0)
-    PyObject *ob = PyCapsule_New(vtable, 0, 0);
-#else
-    PyObject *ob = PyCObject_FromVoidPtr(vtable, 0);
-#endif
-    if (!ob)
-        goto bad;
-    if (PyDict_SetItemString(dict, "__pyx_vtable__", ob) < 0)
-        goto bad;
-    Py_DECREF(ob);
-    return 0;
-bad:
-    Py_XDECREF(ob);
-    return -1;
-}
-
 #ifndef __PYX_HAVE_RT_ImportModule
 #define __PYX_HAVE_RT_ImportModule
 static PyObject *__Pyx_ImportModule(const char *name) {
@@ -32061,25 +29090,6 @@ bad:
 }
 #endif
 
-static void* __Pyx_GetVtable(PyObject *dict) {
-    void* ptr;
-    PyObject *ob = PyMapping_GetItemString(dict, (char *)"__pyx_vtable__");
-    if (!ob)
-        goto bad;
-#if PY_VERSION_HEX >= 0x02070000 && !(PY_MAJOR_VERSION==3&&PY_MINOR_VERSION==0)
-    ptr = PyCapsule_GetPointer(ob, 0);
-#else
-    ptr = PyCObject_AsVoidPtr(ob);
-#endif
-    if (!ptr && !PyErr_Occurred())
-        PyErr_SetString(PyExc_RuntimeError, "invalid vtable found for imported type");
-    Py_DECREF(ob);
-    return ptr;
-bad:
-    Py_XDECREF(ob);
-    return NULL;
-}
-
 #ifndef __PYX_HAVE_RT_ImportFunction
 #define __PYX_HAVE_RT_ImportFunction
 static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**f)(void), const char *sig) {
@@ -32325,6 +29335,65 @@ static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
     return 0;
 }
 
+static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(char* c_str) {
+    return __Pyx_PyUnicode_FromStringAndSize(c_str, strlen(c_str));
+}
+static CYTHON_INLINE char* __Pyx_PyObject_AsString(PyObject* o) {
+    Py_ssize_t ignore;
+    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
+}
+static CYTHON_INLINE char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
+#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
+    if (
+#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
+            __Pyx_sys_getdefaultencoding_not_ascii &&
+#endif
+            PyUnicode_Check(o)) {
+#if PY_VERSION_HEX < 0x03030000
+        char* defenc_c;
+        PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
+        if (!defenc) return NULL;
+        defenc_c = PyBytes_AS_STRING(defenc);
+#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
+        {
+            char* end = defenc_c + PyBytes_GET_SIZE(defenc);
+            char* c;
+            for (c = defenc_c; c < end; c++) {
+                if ((unsigned char) (*c) >= 128) {
+                    PyUnicode_AsASCIIString(o);
+                    return NULL;
+                }
+            }
+        }
+#endif /*__PYX_DEFAULT_STRING_ENCODING_IS_ASCII*/
+        *length = PyBytes_GET_SIZE(defenc);
+        return defenc_c;
+#else /* PY_VERSION_HEX < 0x03030000 */
+        if (PyUnicode_READY(o) == -1) return NULL;
+#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
+        if (PyUnicode_IS_ASCII(o)) {
+            *length = PyUnicode_GET_DATA_SIZE(o);
+            return PyUnicode_AsUTF8(o);
+        } else {
+            PyUnicode_AsASCIIString(o);
+            return NULL;
+        }
+#else /* __PYX_DEFAULT_STRING_ENCODING_IS_ASCII */
+        return PyUnicode_AsUTF8AndSize(o, length);
+#endif /* __PYX_DEFAULT_STRING_ENCODING_IS_ASCII */
+#endif /* PY_VERSION_HEX < 0x03030000 */
+    } else
+#endif /* __PYX_DEFAULT_STRING_ENCODING_IS_ASCII  || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT */
+    {
+        char* result;
+        int r = PyBytes_AsStringAndSize(o, &result, length);
+        if (r < 0) {
+            return NULL;
+        } else {
+            return result;
+        }
+    }
+}
 static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
    int is_true = x == Py_True;
    if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
@@ -32334,14 +29403,14 @@ static CYTHON_INLINE PyObject* __Pyx_PyNumber_Int(PyObject* x) {
   PyNumberMethods *m;
   const char *name = NULL;
   PyObject *res = NULL;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
   if (PyInt_Check(x) || PyLong_Check(x))
 #else
   if (PyLong_Check(x))
 #endif
     return Py_INCREF(x), x;
   m = Py_TYPE(x)->tp_as_number;
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
   if (m && m->nb_int) {
     name = "int";
     res = PyNumber_Int(x);
@@ -32357,7 +29426,7 @@ static CYTHON_INLINE PyObject* __Pyx_PyNumber_Int(PyObject* x) {
   }
 #endif
   if (res) {
-#if PY_VERSION_HEX < 0x03000000
+#if PY_MAJOR_VERSION < 3
     if (!PyInt_Check(res) && !PyLong_Check(res)) {
 #else
     if (!PyLong_Check(res)) {
@@ -32398,11 +29467,10 @@ static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
 }
 static CYTHON_INLINE size_t __Pyx_PyInt_AsSize_t(PyObject* x) {
    unsigned PY_LONG_LONG val = __Pyx_PyInt_AsUnsignedLongLong(x);
-   if (unlikely(val == (unsigned PY_LONG_LONG)-1 && PyErr_Occurred())) {
-       return (size_t)-1;
-   } else if (unlikely(val != (unsigned PY_LONG_LONG)(size_t)val)) {
-       PyErr_SetString(PyExc_OverflowError,
-                       "value too large to convert to size_t");
+   if (unlikely(val != (unsigned PY_LONG_LONG)(size_t)val)) {
+       if ((val != (unsigned PY_LONG_LONG)-1) || !PyErr_Occurred())
+           PyErr_SetString(PyExc_OverflowError,
+                           "value too large to convert to size_t");
        return (size_t)-1;
    }
    return (size_t)val;