don't know

Merge branch 'master' of github.com:redpony/cdec

10 files changed, 2814 insertions, 3186 deletions

diff --git a/python/src/sa/_sa.c b/python/src/sa/_sa.c
index dd5ac0f5..15544970 100644
--- a/python/src/sa/_sa.c
+++ b/python/src/sa/_sa.c
@@ -1,4 +1,4 @@
-/* Generated by Cython 0.17.1 on Fri Jan  4 23:03:37 2013 */
+/* Generated by Cython 0.17.1 on Mon Jan  7 22:31:38 2013 */
 
 #define PY_SSIZE_T_CLEAN
 #include "Python.h"
@@ -603,12 +603,12 @@ struct __pyx_obj_3_sa___pyx_scope_struct_17_genexpr {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2033
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1992
  * 
  *     # Create a rule from source, target, non-terminals, and alignments
  *     def form_rule(self, f_i, e_i, f_span, e_span, nt, al):             # <<<<<<<<<<<<<<
  * 
- *         # Handle non-terminals
+ *         # Substitute in non-terminals
  */
 struct __pyx_obj_3_sa___pyx_scope_struct_21_form_rule {
   PyObject_HEAD
@@ -665,11 +665,11 @@ struct __pyx_obj_3_sa___pyx_scope_struct_12_genexpr {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2090
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2053
  *         f = Phrase(f_sym)
  *         e = Phrase(e_sym)
  *         a = tuple(self.alignment.link(i, j) for (i, j) in links)             # <<<<<<<<<<<<<<
- *         return (f, e, a, f_link_min, f_link_max)
+ *         return (f, e, a, lex_f_i, lex_f_j)
  * 
  */
 struct __pyx_obj_3_sa___pyx_scope_struct_22_genexpr {
@@ -1010,7 +1010,7 @@ struct __pyx_obj_3_sa___pyx_scope_struct_15___iter__ {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2094
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2057
  * 
  *     # Rule string from rule
  *     def fmt_rule(self, f, e, a):             # <<<<<<<<<<<<<<
@@ -1024,7 +1024,7 @@ struct __pyx_obj_3_sa___pyx_scope_struct_23_fmt_rule {
 };
 
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2095
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2058
  *     # Rule string from rule
  *     def fmt_rule(self, f, e, a):
  *         a_str = ' '.join('{0}-{1}'.format(*self.alignment.unlink(packed)) for packed in a)             # <<<<<<<<<<<<<<
@@ -56903,46 +56903,46 @@ static PyObject *__pyx_pw_3_sa_23HieroCachingRuleFactory_12add_instance_1extract
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 }
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1860
- *         # Extract all possible hierarchical phrases starting at a source index
+/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1861
  *         # f_ i and j are current, e_ i and j are previous
+ *         # We care _considering_ f_j, so it is not yet in counts
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- *             if wc + len(nt) > self.max_length or (f_j + 1) > f_len or \
+ *             if f_j > (f_len - 1) or (f_j - f_i) + 1 > self.max_initial_size:
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":1862
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+  __pyx_t_3 = PyTuple_New(2); if (unlikely(!__pyx_t_3)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2019; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2090
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+ *         return (f, e, a, lex_f_i, lex_f_j)
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+    __pyx_GeneratorObject *gen = __Pyx_Generator_New((__pyx_generator_body_t) __pyx_gb_3_sa_23HieroCachingRuleFactory_9form_rule_4generator14, (PyObject *) __pyx_cur_scope); if (unlikely(!gen)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2053; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+  if (unlikely(!__pyx_sent_value)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2053; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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+      __pyx_t_6 = PySequence_ITEM(sequence, 1); if (unlikely(!__pyx_t_6)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2053; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2090; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+      {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2053; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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 }
 
-/* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2033
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+  PyObject *__pyx_v_lex_f_j = NULL;
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2037
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2116
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2117
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-            else {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2121; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-      /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2122
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2102
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-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2103
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+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_23_fmt_rule) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2057; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
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-  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_24_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2095; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_24_genexpr) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2058; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_24_genexpr = &__pyx_type_3_sa___pyx_scope_struct_24_genexpr;
   if (PyType_Ready(&__pyx_type_3_sa___pyx_scope_struct_25___iter__) < 0) {__pyx_filename = __pyx_f[13]; __pyx_lineno = 15; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __pyx_ptype_3_sa___pyx_scope_struct_25___iter__ = &__pyx_type_3_sa___pyx_scope_struct_25___iter__;
@@ -79367,40 +78658,40 @@ PyMODINIT_FUNC PyInit__sa(void)
   __Pyx_GIVEREF(__pyx_t_1);
   __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2125
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2088
  * 
  * # Spans are _inclusive_ on both ends [i, j]
  * def span_check(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_13span_check, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_13span_check, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2088; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_check, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2125; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_check, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2088; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2133
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2096
  *     return True
  * 
  * def span_inc(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_15span_inc, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_15span_inc, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2096; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_inc, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2133; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_inc, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2096; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2139
+  /* "/home/m/workspace/cdec/python/src/sa/rulefactory.pxi":2102
  *         k += 1
  * 
  * def span_dec(vec, i, j):             # <<<<<<<<<<<<<<
  *     k = i
  *     while k <= j:
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_17span_dec, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_3_sa_17span_dec, NULL, __pyx_n_s___sa); if (unlikely(!__pyx_t_1)) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2102; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_dec, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2139; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
+  if (PyObject_SetAttr(__pyx_m, __pyx_n_s__span_dec, __pyx_t_1) < 0) {__pyx_filename = __pyx_f[8]; __pyx_lineno = 2102; __pyx_clineno = __LINE__; goto __pyx_L1_error;}
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
   /* "/home/m/workspace/cdec/python/src/sa/features.pxi":1
diff --git a/python/src/sa/rulefactory.pxi b/python/src/sa/rulefactory.pxi
index 2bc65da2..b10d25dd 100644
--- a/python/src/sa/rulefactory.pxi
+++ b/python/src/sa/rulefactory.pxi
@@ -1840,8 +1840,8 @@ cdef class HieroCachingRuleFactory:
 
         # Pre-compute alignment info
         al = [[] for i in range(f_len)]
-        fe_span = [[f_len + 1, -1] for i in range(f_len)]
-        ef_span = [[e_len + 1, -1] for i in range(e_len)]
+        fe_span = [[e_len + 1, -1] for i in range(f_len)]
+        ef_span = [[f_len + 1, -1] for i in range(e_len)]
         for (f, e) in alignment:
             al[f].append(e)
             fe_span[f][0] = min(fe_span[f][0], e)
@@ -1857,10 +1857,10 @@ cdef class HieroCachingRuleFactory:
         
         # Extract all possible hierarchical phrases starting at a source index
         # f_ i and j are current, e_ i and j are previous
+        # We care _considering_ f_j, so it is not yet in counts
         def extract(f_i, f_j, e_i, e_j, min_bound, wc, links, nt, nt_open):
             # Phrase extraction limits
-            if wc + len(nt) > self.max_length or f_j > (f_len - 1) or \
-                    (f_j - f_i) + 1 > self.max_initial_size:
+            if f_j > (f_len - 1) or (f_j - f_i) + 1 > self.max_initial_size:
                 return
             # Unaligned word
             if not al[f_j]:
@@ -1870,7 +1870,8 @@ cdef class HieroCachingRuleFactory:
                     extract(f_i, f_j + 1, e_i, e_j, min_bound, wc, links, nt, True)
                     nt[-1][2] -= 1
                 # Unless non-terminal already open, always extend with word
-                if not nt_open:
+                # Make sure adding a word doesn't exceed length
+                if not nt_open and wc < self.max_length:
                     extract(f_i, f_j + 1, e_i, e_j, min_bound, wc + 1, links, nt, False)
                 return
             # Aligned word
@@ -1881,11 +1882,8 @@ cdef class HieroCachingRuleFactory:
             # Check reverse links of newly covered words to see if they violate left
             # bound (return) or extend minimum right bound for chunk
             new_min_bound = min_bound
-            #new_min_nt_bound = min_nt_bound
-            # violates_nt = False 
             # First aligned word creates span
-            # TODO: NO bound
-            if e_j == -1:
+            if e_j == -1: 
                 for i from new_e_i <= i <= new_e_j:
                     if ef_span[i][0] < f_i:
                         return
@@ -1908,15 +1906,14 @@ cdef class HieroCachingRuleFactory:
                         nt_collision = True
                 # Non-terminal collisions block word extraction and extension, but
                 # may be okay for continuing non-terminals
-                if not nt_collision:
+                if not nt_collision and wc < self.max_length:
                     plus_links = []
                     for link in al[f_j]:
                         plus_links.append((f_j, link))
                         cover[link] += 1
                     links.append(plus_links)
-                    if links:
-                        if f_j >= new_min_bound:
-                            rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
+                    if links and f_j >= new_min_bound:
+                        rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                     extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc + 1, links, nt, False)
                     links.pop()
                     for link in al[f_j]:
@@ -1940,9 +1937,8 @@ cdef class HieroCachingRuleFactory:
                     span_inc(cover, nt[-1][4] + 1, link_j)
                     span_inc(e_nt_cover, nt[-1][4] + 1, link_j)
                     nt[-1][4] = link_j
-                if links:
-                    if f_j >= new_min_bound:
-                        rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
+                if links and f_j >= new_min_bound:
+                    rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
                 extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc, links, nt, False)
                 nt[-1] = old_last_nt
                 if link_i < nt[-1][3]:
@@ -1952,7 +1948,7 @@ cdef class HieroCachingRuleFactory:
                     span_dec(cover, nt[-1][4] + 1, link_j)
                     span_dec(e_nt_cover, nt[-1][4] + 1, link_j)
             # Try to start a new non-terminal, extract, extend
-            if (not nt or f_j - nt[-1][2] > 1) and len(nt) < self.max_nonterminals:
+            if (not nt or f_j - nt[-1][2] > 1) and wc < self.max_length and len(nt) < self.max_nonterminals:
                 # Check for collisions
                 if not span_check(cover, link_i, link_j):
                     return
@@ -1960,26 +1956,19 @@ cdef class HieroCachingRuleFactory:
                 span_inc(e_nt_cover, link_i, link_j)
                 nt.append([(nt[-1][0] + 1) if nt else 1, f_j, f_j, link_i, link_j])
                 # Require at least one word in phrase
-                if links:
-                    if f_j >= new_min_bound:
-                        rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
-                extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc, links, nt, False)
+                if links and f_j >= new_min_bound:
+                    rules.add(self.form_rule(f_i, new_e_i, f_words[f_i:f_j + 1], e_words[new_e_i:new_e_j + 1], nt, links))
+                extract(f_i, f_j + 1, new_e_i, new_e_j, new_min_bound, wc + 1, links, nt, False)
                 nt.pop()
                 span_dec(cover, link_i, link_j)
                 span_dec(e_nt_cover, link_i, link_j)
 
         # Try to extract phrases from every f index
-        f_i = 0
-        while f_i < f_len:
+        for f_i from 0 <= f_i < f_len:
             # Skip if phrases won't be tight on left side
             if not al[f_i]:
-                f_i += 1
                 continue
-            extract(f_i, f_i, f_len + 1, -1, f_i, 1, [], [], False)
-            f_i += 1
-
-        for rule in sorted(rules):
-            logger.info(self.fmt_rule(*rule[:3]))
+            extract(f_i, f_i, f_len + 1, -1, f_i, 0, [], [], False)
         
         # Update phrase counts
         for rule in rules:
@@ -2062,7 +2051,6 @@ cdef class HieroCachingRuleFactory:
         f = Phrase(f_sym)
         e = Phrase(e_sym)
         a = tuple(self.alignment.link(i, j) for (i, j) in links)
-        print 'New rule:', self.fmt_rule(f, e, a)
         return (f, e, a, lex_f_i, lex_f_j)
 
     # Rule string from rule
diff --git a/python/tests/extractor/corpus.al.gz b/python/tests/extractor/corpus.al.gz
new file mode 100644
index 00000000..88a3a8ee
--- /dev/null
+++ b/python/tests/extractor/corpus.al.gz
diff --git a/python/tests/extractor/corpus.fr-en.gz b/python/tests/extractor/corpus.fr-en.gz
new file mode 100644
index 00000000..b0b04215
--- /dev/null
+++ b/python/tests/extractor/corpus.fr-en.gz
diff --git a/python/tests/extractor/gold-rules.sort b/python/tests/extractor/gold-rules.sort
new file mode 100644
index 00000000..c6f22c36
--- /dev/null
+++ b/python/tests/extractor/gold-rules.sort
@@ -0,0 +1,140 @@
+[X] ||| A B C D [X,1] ||| B C D [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-1
+[X] ||| A B C D ||| B C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-1
+[X] ||| A B C [X,1] K ||| B [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 4-3 4-4
+[X] ||| A B C [X,1] ||| B [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| A ||| B ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| AA BB CC DD ||| AA BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 2-1 3-0
+[X] ||| AA BB CC [X,1] ||| [X,1] BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 2-1
+[X] ||| AA BB CC ||| BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1 2-0
+[X] ||| AA BB [X,1] DD ||| AA [X,1] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 3-0
+[X] ||| AA BB [X,1] ||| [X,1] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1
+[X] ||| AA BB ||| CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| AA [X,1] CC DD ||| AA BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 2-1 3-0
+[X] ||| AA [X,1] CC [X,2] ||| [X,2] BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 2-1
+[X] ||| AA [X,1] CC ||| BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| AA [X,1] DD ||| AA [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| AA [X,1] ||| [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| AA ||| DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| BB CC DD ||| AA BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1 2-0
+[X] ||| BB CC [X,1] ||| [X,1] BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1
+[X] ||| BB CC ||| BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| BB [X,1] DD ||| AA [X,1] CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| BB [X,1] ||| [X,1] CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| BB ||| CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| CC DD ||| AA BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| CC [X,1] ||| [X,1] BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| CC ||| BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D E F G H ||| C D E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2 3-5 4-5
+[X] ||| D E F [X,1] K ||| C D E F G [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2 4-7 4-8
+[X] ||| D E F [X,1] ||| C D E F G [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2
+[X] ||| D E F ||| C D E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2
+[X] ||| D E [X,1] G H ||| C D [X,1] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 3-5 4-5
+[X] ||| D E [X,1] ||| C D [X,1] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3
+[X] ||| D [X,1] F G H ||| C D E [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-5 4-5
+[X] ||| D [X,1] F [X,2] K ||| C D E [X,1] G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 4-7 4-8
+[X] ||| D [X,1] F [X,2] ||| C D E [X,1] G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2
+[X] ||| D [X,1] F ||| C D E [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2
+[X] ||| D [X,1] G H [X,2] ||| C D [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 3-4
+[X] ||| D [X,1] G H ||| C D [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 3-4
+[X] ||| D [X,1] I J K ||| C D [X,1] I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3 4-5 4-6
+[X] ||| D [X,1] I J [X,2] ||| C D [X,1] I J [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3
+[X] ||| D [X,1] I J ||| C D [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3
+[X] ||| D [X,1] K ||| C D [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 2-5
+[X] ||| D [X,1] L M N ||| C D [X,1] M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 4-3 4-4
+[X] ||| D [X,1] L M [X,2] ||| C D [X,1] [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D [X,1] ||| C D [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D ||| C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| DD ||| AA ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| E F G H [X,1] ||| E F G H [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 2-3 3-3
+[X] ||| E F G H ||| E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 2-3 3-3
+[X] ||| E F [X,1] I J ||| E F G [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 3-4 4-4
+[X] ||| E F [X,1] K ||| E F G [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 3-5 3-6
+[X] ||| E F [X,1] ||| E F G [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| E F ||| E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| E [X,1] G H [X,2] ||| [X,1] F G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 2-3 3-3
+[X] ||| E [X,1] G H ||| [X,1] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 2-3 3-3
+[X] ||| E [X,1] ||| [X,1] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| E ||| F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| F ||| E ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| G H I J K ||| H I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1 4-3 4-4
+[X] ||| G H I J [X,1] ||| H I J [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1
+[X] ||| G H I J ||| H I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1
+[X] ||| G H [X,1] K ||| H [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 3-3 3-4
+[X] ||| G H [X,1] ||| H [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| G H ||| H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| I J K ||| I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-2 2-3
+[X] ||| I J [X,1] ||| I J [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| I J ||| I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| K L M N [X,1] ||| K L M N [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 3-2 3-3
+[X] ||| K L M N ||| K L M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 3-2 3-3
+[X] ||| K L M [X,1] ||| K L [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| K ||| K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| N O P Q R ||| M N O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 1-2 2-3 4-2
+[X] ||| N O [X,1] Q R ||| M N O [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 1-2 4-2
+[X] ||| N [X,1] ||| M N [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| N ||| M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| O P Q R [X,1] ||| O P Q R S [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-1 3-0
+[X] ||| O P Q R ||| O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-1 3-0
+[X] ||| O [X,1] Q R [X,2] ||| O [X,1] Q R S [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| O [X,1] Q R ||| O [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| P ||| P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| S T U V [X,1] ||| T U V [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-0 3-2
+[X] ||| S T U V ||| T U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-0 3-2
+[X] ||| S [X,1] U V [X,2] ||| [X,1] U V [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 3-2
+[X] ||| S [X,1] U V ||| [X,1] U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 3-2
+[X] ||| T ||| T ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| W X Y Z [X,1] ||| W X Y Z [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-0
+[X] ||| W X Y Z ||| W X Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-0
+[X] ||| W X [X,1] Z [X,2] ||| W X [X,1] Z [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| W X [X,1] Z ||| W X [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| Y ||| Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| [X,1] AA BB CC DD ||| [X,1] Z AA BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 3-3 4-2
+[X] ||| [X,1] AA BB CC [X,2] ||| [X,1] Z [X,2] BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 3-3
+[X] ||| [X,1] AA BB [X,2] DD ||| [X,1] Z AA [X,2] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 4-2
+[X] ||| [X,1] AA BB [X,2] ||| [X,1] Z [X,2] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-4 2-3
+[X] ||| [X,1] AA [X,2] CC DD ||| [X,1] Z AA BB [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 3-3 4-2
+[X] ||| [X,1] AA [X,2] DD ||| [X,1] Z AA [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-4 3-2
+[X] ||| [X,1] AA [X,2] ||| [X,1] Z [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3
+[X] ||| [X,1] B C D [X,2] ||| [X,1] C D [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1
+[X] ||| [X,1] B C D ||| [X,1] C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1
+[X] ||| [X,1] B C [X,2] K ||| [X,1] [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 4-3 4-4
+[X] ||| [X,1] BB CC DD ||| AA BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-1 3-0
+[X] ||| [X,1] BB CC [X,2] ||| [X,2] BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-1
+[X] ||| [X,1] BB CC ||| BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-0
+[X] ||| [X,1] BB [X,2] DD ||| AA [X,2] CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 3-0
+[X] ||| [X,1] BB [X,2] ||| [X,2] CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1
+[X] ||| [X,1] BB ||| CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] CC DD ||| AA BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-0
+[X] ||| [X,1] CC [X,2] ||| [X,2] BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1
+[X] ||| [X,1] CC ||| BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] DD ||| AA [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] E F G H ||| [X,1] D E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2 3-5 4-5
+[X] ||| [X,1] E F [X,2] K ||| [X,1] D E F G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2 4-7 4-8
+[X] ||| [X,1] E F [X,2] ||| [X,1] D E F G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2
+[X] ||| [X,1] E F ||| [X,1] D E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2
+[X] ||| [X,1] E [X,2] G H ||| [X,1] D [X,2] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 3-5 4-5
+[X] ||| [X,1] E [X,2] ||| [X,1] D [X,2] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3
+[X] ||| [X,1] F G H [X,2] ||| E [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 2-3 3-3
+[X] ||| [X,1] F G H ||| E [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 2-3 3-3
+[X] ||| [X,1] F [X,2] I J ||| E [X,1] G [X,2] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 3-4 4-4
+[X] ||| [X,1] F [X,2] K ||| E [X,1] G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 3-5 3-6
+[X] ||| [X,1] F [X,2] ||| E [X,1] G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] F ||| E [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] G H I J ||| [X,1] G H I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2 3-3 4-3
+[X] ||| [X,1] G H [X,2] K ||| [X,1] G H [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2 4-5 4-6
+[X] ||| [X,1] G H [X,2] ||| [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2
+[X] ||| [X,1] G H ||| [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2
+[X] ||| [X,1] I J K ||| [X,1] I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1 3-3 3-4
+[X] ||| [X,1] I J [X,2] ||| [X,1] I J [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1
+[X] ||| [X,1] I J ||| [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1
+[X] ||| [X,1] K L M N ||| [X,1] J K L M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3 4-4 4-5
+[X] ||| [X,1] K L M [X,2] ||| [X,1] J K L [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3
+[X] ||| [X,1] K ||| [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3
+[X] ||| [X,1] L M N [X,2] ||| [X,1] M N [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1 3-2
+[X] ||| [X,1] L M N ||| [X,1] M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1 3-2
+[X] ||| [X,1] O P Q R ||| [X,1] O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-2 4-1
+[X] ||| [X,1] O [X,2] Q R ||| [X,1] O [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 4-1
+[X] ||| [X,1] S T U V ||| [X,1] Q R S T U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-6 2-4 4-6
+[X] ||| [X,1] S [X,2] U V ||| [X,1] Q R S [X,2] U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-6 4-6
+[X] ||| [X,1] W X Y Z ||| [X,1] W X Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 3-3 4-1
+[X] ||| [X,1] W X [X,2] Z ||| [X,1] W X [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 4-1
diff --git a/python/tests/extractor/refmt.py b/python/tests/extractor/refmt.py
new file mode 100755
index 00000000..437d5b7a
--- /dev/null
+++ b/python/tests/extractor/refmt.py
@@ -0,0 +1,20 @@
+#!/usr/bin/env python
+
+import collections, sys
+
+lines = []
+f = collections.defaultdict(int)
+fe = collections.defaultdict(lambda: collections.defaultdict(int))
+
+for line in sys.stdin:
+    tok = [x.strip() for x in line.split('|||')]
+    count = int(tok[4])
+    f[tok[1]] += count
+    fe[tok[1]][tok[2]] += count
+    lines.append(tok)
+
+for tok in lines:
+    feat = 'IsSingletonF={0}.0 IsSingletonFE={1}.0'.format(
+        0 if f[tok[1]] > 1 else 1,
+        0 if fe[tok[1]][tok[2]] > 1 else 1)
+    print ' ||| '.join((tok[0], tok[1], tok[2], feat, tok[3]))
diff --git a/python/tests/extractor/rules.sort b/python/tests/extractor/rules.sort
new file mode 100644
index 00000000..c6f22c36
--- /dev/null
+++ b/python/tests/extractor/rules.sort
@@ -0,0 +1,140 @@
+[X] ||| A B C D [X,1] ||| B C D [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-1
+[X] ||| A B C D ||| B C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-1
+[X] ||| A B C [X,1] K ||| B [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 4-3 4-4
+[X] ||| A B C [X,1] ||| B [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| A ||| B ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| AA BB CC DD ||| AA BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 2-1 3-0
+[X] ||| AA BB CC [X,1] ||| [X,1] BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 2-1
+[X] ||| AA BB CC ||| BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1 2-0
+[X] ||| AA BB [X,1] DD ||| AA [X,1] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 1-2 3-0
+[X] ||| AA BB [X,1] ||| [X,1] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1
+[X] ||| AA BB ||| CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| AA [X,1] CC DD ||| AA BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 2-1 3-0
+[X] ||| AA [X,1] CC [X,2] ||| [X,2] BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-3 2-1
+[X] ||| AA [X,1] CC ||| BB [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| AA [X,1] DD ||| AA [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| AA [X,1] ||| [X,1] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| AA ||| DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| BB CC DD ||| AA BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1 2-0
+[X] ||| BB CC [X,1] ||| [X,1] BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-1
+[X] ||| BB CC ||| BB CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| BB [X,1] DD ||| AA [X,1] CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 2-0
+[X] ||| BB [X,1] ||| [X,1] CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| BB ||| CC ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| CC DD ||| AA BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| CC [X,1] ||| [X,1] BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| CC ||| BB ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D E F G H ||| C D E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2 3-5 4-5
+[X] ||| D E F [X,1] K ||| C D E F G [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2 4-7 4-8
+[X] ||| D E F [X,1] ||| C D E F G [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2
+[X] ||| D E F ||| C D E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 2-2
+[X] ||| D E [X,1] G H ||| C D [X,1] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3 3-5 4-5
+[X] ||| D E [X,1] ||| C D [X,1] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-3
+[X] ||| D [X,1] F G H ||| C D E [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-5 4-5
+[X] ||| D [X,1] F [X,2] K ||| C D E [X,1] G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 4-7 4-8
+[X] ||| D [X,1] F [X,2] ||| C D E [X,1] G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2
+[X] ||| D [X,1] F ||| C D E [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2
+[X] ||| D [X,1] G H [X,2] ||| C D [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 3-4
+[X] ||| D [X,1] G H ||| C D [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 3-4
+[X] ||| D [X,1] I J K ||| C D [X,1] I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3 4-5 4-6
+[X] ||| D [X,1] I J [X,2] ||| C D [X,1] I J [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3
+[X] ||| D [X,1] I J ||| C D [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-3 3-3
+[X] ||| D [X,1] K ||| C D [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-4 2-5
+[X] ||| D [X,1] L M N ||| C D [X,1] M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 4-3 4-4
+[X] ||| D [X,1] L M [X,2] ||| C D [X,1] [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D [X,1] ||| C D [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| D ||| C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| DD ||| AA ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| E F G H [X,1] ||| E F G H [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 2-3 3-3
+[X] ||| E F G H ||| E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 2-3 3-3
+[X] ||| E F [X,1] I J ||| E F G [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 3-4 4-4
+[X] ||| E F [X,1] K ||| E F G [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0 3-5 3-6
+[X] ||| E F [X,1] ||| E F G [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| E F ||| E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 1-0
+[X] ||| E [X,1] G H [X,2] ||| [X,1] F G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 2-3 3-3
+[X] ||| E [X,1] G H ||| [X,1] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1 2-3 3-3
+[X] ||| E [X,1] ||| [X,1] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-1
+[X] ||| E ||| F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| F ||| E ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| G H I J K ||| H I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1 4-3 4-4
+[X] ||| G H I J [X,1] ||| H I J [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1
+[X] ||| G H I J ||| H I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-1 3-1
+[X] ||| G H [X,1] K ||| H [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 3-3 3-4
+[X] ||| G H [X,1] ||| H [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| G H ||| H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| I J K ||| I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0 2-2 2-3
+[X] ||| I J [X,1] ||| I J [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| I J ||| I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-0
+[X] ||| K L M N [X,1] ||| K L M N [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 3-2 3-3
+[X] ||| K L M N ||| K L M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 3-2 3-3
+[X] ||| K L M [X,1] ||| K L [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| K ||| K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| N O P Q R ||| M N O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 1-2 2-3 4-2
+[X] ||| N O [X,1] Q R ||| M N O [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1 1-2 4-2
+[X] ||| N [X,1] ||| M N [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| N ||| M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 0-1
+[X] ||| O P Q R [X,1] ||| O P Q R S [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-1 3-0
+[X] ||| O P Q R ||| O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 1-1 3-0
+[X] ||| O [X,1] Q R [X,2] ||| O [X,1] Q R S [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| O [X,1] Q R ||| O [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| P ||| P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| S T U V [X,1] ||| T U V [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-0 3-2
+[X] ||| S T U V ||| T U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 1-0 3-2
+[X] ||| S [X,1] U V [X,2] ||| [X,1] U V [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 3-2
+[X] ||| S [X,1] U V ||| [X,1] U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-2 3-2
+[X] ||| T ||| T ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| W X Y Z [X,1] ||| W X Y Z [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-0
+[X] ||| W X Y Z ||| W X Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 2-2 3-0
+[X] ||| W X [X,1] Z [X,2] ||| W X [X,1] Z [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| W X [X,1] Z ||| W X [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0 3-0
+[X] ||| Y ||| Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 0-0
+[X] ||| [X,1] AA BB CC DD ||| [X,1] Z AA BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 3-3 4-2
+[X] ||| [X,1] AA BB CC [X,2] ||| [X,1] Z [X,2] BB CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 3-3
+[X] ||| [X,1] AA BB [X,2] DD ||| [X,1] Z AA [X,2] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 2-4 4-2
+[X] ||| [X,1] AA BB [X,2] ||| [X,1] Z [X,2] CC DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-4 2-3
+[X] ||| [X,1] AA [X,2] CC DD ||| [X,1] Z AA BB [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-5 3-3 4-2
+[X] ||| [X,1] AA [X,2] DD ||| [X,1] Z AA [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-4 3-2
+[X] ||| [X,1] AA [X,2] ||| [X,1] Z [X,2] DD ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3
+[X] ||| [X,1] B C D [X,2] ||| [X,1] C D [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1
+[X] ||| [X,1] B C D ||| [X,1] C ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1
+[X] ||| [X,1] B C [X,2] K ||| [X,1] [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 4-3 4-4
+[X] ||| [X,1] BB CC DD ||| AA BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-1 3-0
+[X] ||| [X,1] BB CC [X,2] ||| [X,2] BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-1
+[X] ||| [X,1] BB CC ||| BB CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-0
+[X] ||| [X,1] BB [X,2] DD ||| AA [X,2] CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 3-0
+[X] ||| [X,1] BB [X,2] ||| [X,2] CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1
+[X] ||| [X,1] BB ||| CC [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] CC DD ||| AA BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-0
+[X] ||| [X,1] CC [X,2] ||| [X,2] BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1
+[X] ||| [X,1] CC ||| BB [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] DD ||| AA [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] E F G H ||| [X,1] D E F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2 3-5 4-5
+[X] ||| [X,1] E F [X,2] K ||| [X,1] D E F G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2 4-7 4-8
+[X] ||| [X,1] E F [X,2] ||| [X,1] D E F G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2
+[X] ||| [X,1] E F ||| [X,1] D E F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 2-2
+[X] ||| [X,1] E [X,2] G H ||| [X,1] D [X,2] F G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3 3-5 4-5
+[X] ||| [X,1] E [X,2] ||| [X,1] D [X,2] F ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-3
+[X] ||| [X,1] F G H [X,2] ||| E [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 2-3 3-3
+[X] ||| [X,1] F G H ||| E [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 2-3 3-3
+[X] ||| [X,1] F [X,2] I J ||| E [X,1] G [X,2] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 3-4 4-4
+[X] ||| [X,1] F [X,2] K ||| E [X,1] G [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0 3-5 3-6
+[X] ||| [X,1] F [X,2] ||| E [X,1] G [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] F ||| E [X,1] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-0
+[X] ||| [X,1] G H I J ||| [X,1] G H I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2 3-3 4-3
+[X] ||| [X,1] G H [X,2] K ||| [X,1] G H [X,2] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2 4-5 4-6
+[X] ||| [X,1] G H [X,2] ||| [X,1] G H [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2
+[X] ||| [X,1] G H ||| [X,1] G H ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 2-2
+[X] ||| [X,1] I J K ||| [X,1] I J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1 3-3 3-4
+[X] ||| [X,1] I J [X,2] ||| [X,1] I J [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1
+[X] ||| [X,1] I J ||| [X,1] I ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-1
+[X] ||| [X,1] K L M N ||| [X,1] J K L M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3 4-4 4-5
+[X] ||| [X,1] K L M [X,2] ||| [X,1] J K L [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3
+[X] ||| [X,1] K ||| [X,1] J K L ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-2 1-3
+[X] ||| [X,1] L M N [X,2] ||| [X,1] M N [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1 3-2
+[X] ||| [X,1] L M N ||| [X,1] M N ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 3-1 3-2
+[X] ||| [X,1] O P Q R ||| [X,1] O P ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 2-2 4-1
+[X] ||| [X,1] O [X,2] Q R ||| [X,1] O [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 4-1
+[X] ||| [X,1] S T U V ||| [X,1] Q R S T U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-6 2-4 4-6
+[X] ||| [X,1] S [X,2] U V ||| [X,1] Q R S [X,2] U V ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-6 4-6
+[X] ||| [X,1] W X Y Z ||| [X,1] W X Y ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 3-3 4-1
+[X] ||| [X,1] W X [X,2] Z ||| [X,1] W X [X,2] ||| IsSingletonF=1.0 IsSingletonFE=1.0 ||| 1-1 4-1
diff --git a/python/tests/extractor/run.sh b/python/tests/extractor/run.sh
new file mode 100755
index 00000000..f44da9f8
--- /dev/null
+++ b/python/tests/extractor/run.sh
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# Make sure that the sa and online extractors are producing the same (correct) output
+
+set -x verbose
+
+python -m cdec.sa.compile -a corpus.al.gz -b corpus.fr-en.gz -o extract >| extract.ini
+
+cat test.in | python -m cdec.sa.extract -c extract.ini -g gold -o 2>&1 | egrep '\[X\].+\|\|\|.+\|\|\|.+\|\|\|.+\|\|\|'|sed -re 's/INFO.+://g' | ./refmt.py | LC_ALL=C sort >| rules.sort
+
+cd gold && cat grammar.0|sed -re 's/Egiv.+(IsSingletonF=)/\1/g'|LC_ALL=C sort >| rules.sort && cd ..
+
+diff gold/rules.sort gold-rules.sort
+diff rules.sort gold-rules.sort
diff --git a/python/tests/extractor/test.in b/python/tests/extractor/test.in
new file mode 100644
index 00000000..42f1a9dc
--- /dev/null
+++ b/python/tests/extractor/test.in
@@ -0,0 +1 @@
+A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD ||| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA BB CC DD ||| 0-1 3-2 4-5 5-4 6-7 7-7 8-8 9-8 10-10 10-11 13-12 13-13 14-14 15-15 17-14 18-21 19-19 21-21 22-22 24-24 25-22 26-29 27-28 28-27 29-26
diff --git a/python/tests/extractor/test.vis b/python/tests/extractor/test.vis
new file mode 100644
index 00000000..2d30a9f4
--- /dev/null
+++ b/python/tests/extractor/test.vis
@@ -0,0 +1,34 @@
+ 012345678901234567890123456789
+0.*............................0
+1..............................1
+2..............................2
+3..*...........................3
+4.....*........................4
+5....*.........................5
+6.......*......................6
+7.......*......................7
+8........*.....................8
+9........*.....................9
+0..........**..................0
+1..............................1
+2..............................2
+3............**................3
+4..............*...............4
+5...............*..............5
+6..............................6
+7..............*...............7
+8.....................*........8
+9...................*..........9
+0..............................0
+1.....................*........1
+2......................*.......2
+3..............................3
+4........................*.....4
+5......................*.......5
+6.............................*6
+7............................*.7
+8...........................*..8
+9..........................*...9
+ 012345678901234567890123456789
+
+0-1 3-2 4-5 5-4 6-7 7-7 8-8 9-8 10-10 10-11 13-12 13-13 14-14 15-15 17-14 18-21 19-19 21-21 22-22 24-24 25-22 26-29 27-28 28-27 29-26