path: root/utils/constituent_reorder_model.cc

/*
 * constituent_reorder_model.cc
 *
 *  Created on: Jul 10, 2013
 *      Author: junhuili
 */

#include <boost/program_options.hpp>

#include "alignment.h"
#include "tree.h"
#include "synutils.h"
#include "tsuruoka_maxent.h"

#include <unordered_map>

using namespace std;

typedef std::unordered_map<std::string, int> Map;
typedef std::unordered_map<std::string, int>::iterator Iterator;

namespace po = boost::program_options;

inline void fnPreparingTrainingdata(const char* pszFName, int iCutoff,
                                    const char* pszNewFName) {
  SFReader* pFReader = new STxtFileReader(pszFName);
  char* pszLine = new char[100001];
  int iLen;
  Map hashPredicate;
  while (pFReader->fnReadNextLine(pszLine, &iLen)) {
    if (iLen == 0) continue;

    vector<string> vecTerms;
    SplitOnWhitespace(string(pszLine), &vecTerms);

    for (size_t i = 0; i < vecTerms.size() - 1; i++) {
      Iterator iter = hashPredicate.find(vecTerms[i]);
      if (iter == hashPredicate.end()) {
        hashPredicate[vecTerms[i]] = 1;

      } else {
        iter->second++;
      }
    }
  }
  delete pFReader;

  pFReader = new STxtFileReader(pszFName);
  FILE* fpOut = fopen(pszNewFName, "w");
  while (pFReader->fnReadNextLine(pszLine, &iLen)) {
    if (iLen == 0) continue;

    vector<string> vecTerms;
    SplitOnWhitespace(string(pszLine), &vecTerms);
    ostringstream ostr;
    for (size_t i = 0; i < vecTerms.size() - 1; i++) {
      Iterator iter = hashPredicate.find(vecTerms[i]);
      assert(iter != hashPredicate.end());
      if (iter->second >= iCutoff) {
        ostr << vecTerms[i] << " ";
      }
    }
    if (ostr.str().length() > 0) {
      ostr << vecTerms[vecTerms.size() - 1];
      fprintf(fpOut, "%s\n", ostr.str().c_str());
    }
  }
  fclose(fpOut);
  delete pFReader;

  delete[] pszLine;
}

struct SConstReorderTrainer {
  SConstReorderTrainer(
      const char* pszSynFname,     // source-side flattened parse tree file name
      const char* pszAlignFname,   // alignment filename
      const char* pszSourceFname,  // source file name
      const char* pszTargetFname,  // target file name
      const char* pszInstanceFname,  // training instance file name
      const char* pszModelPrefix,    // classifier model file name prefix
      int iCutoff,                   // feature count threshold
      const char* pszOption  // other classifier parameters (for svmlight)
      ) {
    fnGenerateInstanceFile(pszSynFname, pszAlignFname, pszSourceFname,
                           pszTargetFname, pszInstanceFname);

    string strInstanceLeftFname = string(pszInstanceFname) + string(".left");
    string strInstanceRightFname = string(pszInstanceFname) + string(".right");

    string strModelLeftFname = string(pszModelPrefix) + string(".left");
    string strModelRightFname = string(pszModelPrefix) + string(".right");

    fprintf(stdout, "...Training the left ordering model\n");
    fnTraining(strInstanceLeftFname.c_str(), strModelLeftFname.c_str(),
               iCutoff);
    fprintf(stdout, "...Training the right ordering model\n");
    fnTraining(strInstanceRightFname.c_str(), strModelRightFname.c_str(),
               iCutoff);
  }
  ~SConstReorderTrainer() {}

 private:
  void fnTraining(const char* pszInstanceFname, const char* pszModelFname,
                  int iCutoff) {
    char* pszNewInstanceFName = new char[strlen(pszInstanceFname) + 50];
    if (iCutoff > 0) {
      sprintf(pszNewInstanceFName, "%s.tmp", pszInstanceFname);
      fnPreparingTrainingdata(pszInstanceFname, iCutoff, pszNewInstanceFName);
    } else {
      strcpy(pszNewInstanceFName, pszInstanceFname);
    }

    /*Zhangle_Maxent *pZhangleMaxent = new Zhangle_Maxent(NULL);
pZhangleMaxent->fnTrain(pszInstanceFname, "lbfgs", pszModelFname, 100, 2.0);
delete pZhangleMaxent;*/

    Tsuruoka_Maxent* pMaxent = new Tsuruoka_Maxent(NULL);
    pMaxent->fnTrain(pszNewInstanceFName, "l1", pszModelFname, 300);
    delete pMaxent;

    if (strcmp(pszNewInstanceFName, pszInstanceFname) != 0) {
      sprintf(pszNewInstanceFName, "rm %s.tmp", pszInstanceFname);
      system(pszNewInstanceFName);
    }
    delete[] pszNewInstanceFName;
  }

  inline bool fnIsVerbPOS(const char* pszTerm) {
    if (strcmp(pszTerm, "VV") == 0 || strcmp(pszTerm, "VA") == 0 ||
        strcmp(pszTerm, "VC") == 0 || strcmp(pszTerm, "VE") == 0)
      return true;
    return false;
  }

  inline void fnGetOutcome(int iL1, int iR1, int iL2, int iR2,
                           const SAlignment* pAlign, string& strOutcome) {
    if (iL1 == -1 && iL2 == -1)
      strOutcome = "BU";  // 1. both are untranslated
    else if (iL1 == -1)
      strOutcome = "1U";  // 2. XP1 is untranslated
    else if (iL2 == -1)
      strOutcome = "2U";  // 3. XP2 is untranslated
    else if (iL1 == iL2 && iR2 == iR2)
      strOutcome = "SS";  // 4. Have same scope
    else if (iL1 <= iL2 && iR1 >= iR2)
      strOutcome = "1C2";  // 5. XP1's translation covers XP2's
    else if (iL1 >= iL2 && iR1 <= iR2)
      strOutcome = "2C1";  // 6. XP2's translation covers XP1's
    else if (iR1 < iL2) {
      int i = iR1 + 1;
      /*while (i < iL2) {
              if (pAlign->fnIsAligned(i, false))
                      break;
              i++;
      }*/
      if (i == iL2)
        strOutcome = "M";  // 7. Monotone
      else
        strOutcome = "DM";  // 8. Discontinuous monotone
    } else if (iL1 < iL2 && iL2 <= iR1 && iR1 < iR2)
      strOutcome = "OM";  // 9. Overlap monotone
    else if (iR2 < iL1) {
      int i = iR2 + 1;
      /*while (i < iL1) {
              if (pAlign->fnIsAligned(i, false))
                      break;
              i++;
      }*/
      if (i == iL1)
        strOutcome = "S";  // 10. Swap
      else
        strOutcome = "DS";  // 11. Discontinuous swap
    } else if (iL2 < iL1 && iL1 <= iR2 && iR2 < iR1)
      strOutcome = "OS";  // 12. Overlap swap
    else
      assert(false);
  }

  inline void fnGetOutcome(int i1, int i2, string& strOutcome) {
    assert(i1 != i2);
    if (i1 < i2) {
      if (i2 > i1 + 1)
        strOutcome = string("DM");
      else
        strOutcome = string("M");
    } else {
      if (i1 > i2 + 1)
        strOutcome = string("DS");
      else
        strOutcome = string("S");
    }
  }

  inline void fnGetRelativePosition(const vector<int>& vecLeft,
                                    vector<int>& vecPosition) {
    vecPosition.clear();

    vector<float> vec;
    for (size_t i = 0; i < vecLeft.size(); i++) {
      if (vecLeft[i] == -1) {
        if (i == 0)
          vec.push_back(-1);
        else
          vec.push_back(vecLeft[i - 1] + 0.1);
      } else
        vec.push_back(vecLeft[i]);
    }

    for (size_t i = 0; i < vecLeft.size(); i++) {
      int count = 0;

      for (size_t j = 0; j < vecLeft.size(); j++) {
        if (j == i) continue;
        if (vec[j] < vec[i]) {
          count++;
        } else if (vec[j] == vec[i] && j < i) {
          count++;
        }
      }
      vecPosition.push_back(count);
    }
  }

  /*
   * features:
   * f1: (left_label, right_label, parent_label)
   * f2: (left_label, right_label, parent_label, other_right_sibling_label)
   * f3: (left_label, right_label, parent_label, other_left_sibling_label)
   * f4: (left_label, right_label, left_head_pos)
   * f5: (left_label, right_label, left_head_word)
   * f6: (left_label, right_label, right_head_pos)
   * f7: (left_label, right_label, right_head_word)
   * f8: (left_label, right_label, left_chunk_status)
   * f9: (left_label, right_label, right_chunk_status)
   * f10: (left_label, parent_label)
   * f11: (right_label, parent_label)
   */
  void fnGenerateInstance(const SParsedTree* pTree, const STreeItem* pParent,
                          int iPos, const vector<string>& vecChunkStatus,
                          const vector<int>& vecPosition,
                          const vector<string>& vecSTerms,
                          const vector<string>& vecTTerms, string& strOutcome,
                          ostringstream& ostr) {
    STreeItem* pCon1, *pCon2;
    pCon1 = pParent->m_vecChildren[iPos - 1];
    pCon2 = pParent->m_vecChildren[iPos];

    fnGetOutcome(vecPosition[iPos - 1], vecPosition[iPos], strOutcome);

    string left_label = string(pCon1->m_pszTerm);
    string right_label = string(pCon2->m_pszTerm);
    string parent_label = string(pParent->m_pszTerm);

    vector<string> vec_other_right_sibling;
    for (int i = iPos + 1; i < pParent->m_vecChildren.size(); i++)
      vec_other_right_sibling.push_back(
          string(pParent->m_vecChildren[i]->m_pszTerm));
    if (vec_other_right_sibling.size() == 0)
      vec_other_right_sibling.push_back(string("NULL"));
    vector<string> vec_other_left_sibling;
    for (int i = 0; i < iPos - 1; i++)
      vec_other_left_sibling.push_back(
          string(pParent->m_vecChildren[i]->m_pszTerm));
    if (vec_other_left_sibling.size() == 0)
      vec_other_left_sibling.push_back(string("NULL"));

    // generate features
    // f1
    ostr << "f1=" << left_label << "_" << right_label << "_" << parent_label;
    // f2
    for (int i = 0; i < vec_other_right_sibling.size(); i++)
      ostr << " f2=" << left_label << "_" << right_label << "_" << parent_label
           << "_" << vec_other_right_sibling[i];
    // f3
    for (int i = 0; i < vec_other_left_sibling.size(); i++)
      ostr << " f3=" << left_label << "_" << right_label << "_" << parent_label
           << "_" << vec_other_left_sibling[i];
    // f4
    ostr << " f4=" << left_label << "_" << right_label << "_"
         << pTree->m_vecTerminals[pCon1->m_iHeadWord]->m_ptParent->m_pszTerm;
    // f5
    ostr << " f5=" << left_label << "_" << right_label << "_"
         << vecSTerms[pCon1->m_iHeadWord];
    // f6
    ostr << " f6=" << left_label << "_" << right_label << "_"
         << pTree->m_vecTerminals[pCon2->m_iHeadWord]->m_ptParent->m_pszTerm;
    // f7
    ostr << " f7=" << left_label << "_" << right_label << "_"
         << vecSTerms[pCon2->m_iHeadWord];
    // f8
    ostr << " f8=" << left_label << "_" << right_label << "_"
         << vecChunkStatus[iPos - 1];
    // f9
    ostr << " f9=" << left_label << "_" << right_label << "_"
         << vecChunkStatus[iPos];
    // f10
    ostr << " f10=" << left_label << "_" << parent_label;
    // f11
    ostr << " f11=" << right_label << "_" << parent_label;
  }

  /*
   * Source side (11 features):
   * f1: the categories of XP1 and XP2 (f1_1, f1_2)
   * f2: the head words of XP1 and XP2 (f2_1, f2_2)
   * f3: the first and last word of XP1 (f3_f, f3_l)
   * f4: the first and last word of XP2 (f4_f, f4_l)
   * f5: is XP1 or XP2 the head node (f5_1, f5_2)
   * f6: the category of the common parent
   * Target side (6 features):
   * f7: the first and the last word of XP1's translation (f7_f, f7_l)
   * f8: the first and the last word of XP2's translation (f8_f, f8_l)
   * f9: the translation of XP1's and XP2's head word (f9_1, f9_2)
   */
  void fnGenerateInstance(const SParsedTree* pTree, const STreeItem* pParent,
                          const STreeItem* pCon1, const STreeItem* pCon2,
                          const SAlignment* pAlign,
                          const vector<string>& vecSTerms,
                          const vector<string>& vecTTerms, string& strOutcome,
                          ostringstream& ostr) {

    int iLeft1, iRight1, iLeft2, iRight2;
    pAlign->fnGetLeftRightMost(pCon1->m_iBegin, pCon1->m_iEnd, true, iLeft1,
                               iRight1);
    pAlign->fnGetLeftRightMost(pCon2->m_iBegin, pCon2->m_iEnd, true, iLeft2,
                               iRight2);

    fnGetOutcome(iLeft1, iRight1, iLeft2, iRight2, pAlign, strOutcome);

    // generate features
    // f1
    ostr << "f1_1=" << pCon1->m_pszTerm << " f1_2=" << pCon2->m_pszTerm;
    // f2
    ostr << " f2_1=" << vecSTerms[pCon1->m_iHeadWord] << " f2_2"
         << vecSTerms[pCon2->m_iHeadWord];
    // f3
    ostr << " f3_f=" << vecSTerms[pCon1->m_iBegin]
         << " f3_l=" << vecSTerms[pCon1->m_iEnd];
    // f4
    ostr << " f4_f=" << vecSTerms[pCon2->m_iBegin]
         << " f4_l=" << vecSTerms[pCon2->m_iEnd];
    // f5
    if (pParent->m_iHeadChild == pCon1->m_iBrotherIndex)
      ostr << " f5_1=1";
    else
      ostr << " f5_1=0";
    if (pParent->m_iHeadChild == pCon2->m_iBrotherIndex)
      ostr << " f5_2=1";
    else
      ostr << " f5_2=0";
    // f6
    ostr << " f6=" << pParent->m_pszTerm;

    /*//f7
    if (iLeft1 != -1) {
            ostr << " f7_f=" << vecTTerms[iLeft1] << " f7_l=" <<
    vecTTerms[iRight1];
    }
    if (iLeft2 != -1) {
            ostr << " f8_f=" << vecTTerms[iLeft2] << " f8_l=" <<
    vecTTerms[iRight2];
    }

    const vector<int>* pvecTarget =
    pAlign->fnGetSingleWordAlign(pCon1->m_iHeadWord, true);
    string str = "";
    for (size_t i = 0; pvecTarget != NULL && i < pvecTarget->size(); i++) {
            str += vecTTerms[(*pvecTarget)[i]] + "_";
    }
    if (str.length() > 0) {
            ostr << " f9_1=" << str.substr(0, str.size()-1);
    }
    pvecTarget = pAlign->fnGetSingleWordAlign(pCon2->m_iHeadWord, true);
    str = "";
    for (size_t i = 0; pvecTarget != NULL && i < pvecTarget->size(); i++) {
            str += vecTTerms[(*pvecTarget)[i]] + "_";
    }
    if (str.length() > 0) {
            ostr << " f9_2=" << str.substr(0, str.size()-1);
    } */
  }

  void fnGetFocusedParentNodes(const SParsedTree* pTree,
                               vector<STreeItem*>& vecFocused) {
    for (size_t i = 0; i < pTree->m_vecTerminals.size(); i++) {
      STreeItem* pParent = pTree->m_vecTerminals[i]->m_ptParent;

      while (pParent != NULL) {
        // if (pParent->m_vecChildren.size() > 1 && pParent->m_iEnd -
        // pParent->m_iBegin > 5) {
        if (pParent->m_vecChildren.size() > 1) {
          // do constituent reordering for all children of pParent
          vecFocused.push_back(pParent);
        }
        if (pParent->m_iBrotherIndex != 0) break;
        pParent = pParent->m_ptParent;
      }
    }
  }

  void fnGenerateInstanceFile(
      const char* pszSynFname,     // source-side flattened parse tree file name
      const char* pszAlignFname,   // alignment filename
      const char* pszSourceFname,  // source file name
      const char* pszTargetFname,  // target file name
      const char* pszInstanceFname  // training instance file name
      ) {
    SAlignmentReader* pAlignReader = new SAlignmentReader(pszAlignFname);
    SParseReader* pParseReader = new SParseReader(pszSynFname, false);
    STxtFileReader* pTxtSReader = new STxtFileReader(pszSourceFname);
    STxtFileReader* pTxtTReader = new STxtFileReader(pszTargetFname);

    string strInstanceLeftFname = string(pszInstanceFname) + string(".left");
    string strInstanceRightFname = string(pszInstanceFname) + string(".right");

    FILE* fpLeftOut = fopen(strInstanceLeftFname.c_str(), "w");
    assert(fpLeftOut != NULL);

    FILE* fpRightOut = fopen(strInstanceRightFname.c_str(), "w");
    assert(fpRightOut != NULL);

    // read sentence by sentence
    SAlignment* pAlign;
    SParsedTree* pTree;
    char* pszLine = new char[50001];
    int iSentNum = 0;
    while ((pAlign = pAlignReader->fnReadNextAlignment()) != NULL) {
      pTree = pParseReader->fnReadNextParseTree();
      assert(pTxtSReader->fnReadNextLine(pszLine, NULL));
      vector<string> vecSTerms;
      SplitOnWhitespace(string(pszLine), &vecSTerms);
      assert(pTxtTReader->fnReadNextLine(pszLine, NULL));
      vector<string> vecTTerms;
      SplitOnWhitespace(string(pszLine), &vecTTerms);

      if (pTree != NULL) {

        vector<STreeItem*> vecFocused;
        fnGetFocusedParentNodes(pTree, vecFocused);

        for (size_t i = 0; i < vecFocused.size(); i++) {

          STreeItem* pParent = vecFocused[i];

          vector<int> vecLeft, vecRight;
          for (size_t j = 0; j < pParent->m_vecChildren.size(); j++) {
            STreeItem* pCon1 = pParent->m_vecChildren[j];
            int iLeft1, iRight1;
            pAlign->fnGetLeftRightMost(pCon1->m_iBegin, pCon1->m_iEnd, true,
                                       iLeft1, iRight1);
            vecLeft.push_back(iLeft1);
            vecRight.push_back(iRight1);
          }
          vector<int> vecLeftPosition;
          fnGetRelativePosition(vecLeft, vecLeftPosition);
          vector<int> vecRightPosition;
          fnGetRelativePosition(vecRight, vecRightPosition);

          vector<string> vecChunkStatus;
          for (size_t j = 0; j < pParent->m_vecChildren.size(); j++) {
            string strOutcome =
                pAlign->fnIsContinuous(pParent->m_vecChildren[j]->m_iBegin,
                                       pParent->m_vecChildren[j]->m_iEnd);
            vecChunkStatus.push_back(strOutcome);
          }

          for (size_t j = 1; j < pParent->m_vecChildren.size(); j++) {
            // children[j-1] vs. children[j] reordering

            string strLeftOutcome;
            ostringstream ostr;

            fnGenerateInstance(pTree, pParent, j, vecChunkStatus,
                               vecLeftPosition, vecSTerms, vecTTerms,
                               strLeftOutcome, ostr);

            // fprintf(stderr, "%s %s\n", ostr.str().c_str(),
            // strLeftOutcome.c_str());
            fprintf(fpLeftOut, "%s %s\n", ostr.str().c_str(),
                    strLeftOutcome.c_str());

            string strRightOutcome;
            fnGetOutcome(vecRightPosition[j - 1], vecRightPosition[j],
                         strRightOutcome);
            fprintf(fpRightOut, "%s LeftOrder=%s %s\n", ostr.str().c_str(),
                    strLeftOutcome.c_str(), strRightOutcome.c_str());
          }
        }
        delete pTree;
      }

      delete pAlign;
      iSentNum++;

      if (iSentNum % 100000 == 0) fprintf(stderr, "#%d\n", iSentNum);
    }

    fclose(fpLeftOut);
    fclose(fpRightOut);
    delete pAlignReader;
    delete pParseReader;
    delete pTxtSReader;
    delete pTxtTReader;
    delete[] pszLine;
  }

  void fnGenerateInstanceFile2(
      const char* pszSynFname,     // source-side flattened parse tree file name
      const char* pszAlignFname,   // alignment filename
      const char* pszSourceFname,  // source file name
      const char* pszTargetFname,  // target file name
      const char* pszInstanceFname  // training instance file name
      ) {
    SAlignmentReader* pAlignReader = new SAlignmentReader(pszAlignFname);
    SParseReader* pParseReader = new SParseReader(pszSynFname, false);
    STxtFileReader* pTxtSReader = new STxtFileReader(pszSourceFname);
    STxtFileReader* pTxtTReader = new STxtFileReader(pszTargetFname);

    FILE* fpOut = fopen(pszInstanceFname, "w");
    assert(fpOut != NULL);

    // read sentence by sentence
    SAlignment* pAlign;
    SParsedTree* pTree;
    char* pszLine = new char[50001];
    int iSentNum = 0;
    while ((pAlign = pAlignReader->fnReadNextAlignment()) != NULL) {
      pTree = pParseReader->fnReadNextParseTree();
      assert(pTxtSReader->fnReadNextLine(pszLine, NULL));
      vector<string> vecSTerms;
      SplitOnWhitespace(string(pszLine), &vecSTerms);
      assert(pTxtTReader->fnReadNextLine(pszLine, NULL));
      vector<string> vecTTerms;
      SplitOnWhitespace(string(pszLine), &vecTTerms);

      if (pTree != NULL) {

        vector<STreeItem*> vecFocused;
        fnGetFocusedParentNodes(pTree, vecFocused);

        for (size_t i = 0;
             i < vecFocused.size() && pTree->m_vecTerminals.size() > 10; i++) {

          STreeItem* pParent = vecFocused[i];

          for (size_t j = 1; j < pParent->m_vecChildren.size(); j++) {
            // children[j-1] vs. children[j] reordering

            string strOutcome;
            ostringstream ostr;

            fnGenerateInstance(pTree, pParent, pParent->m_vecChildren[j - 1],
                               pParent->m_vecChildren[j], pAlign, vecSTerms,
                               vecTTerms, strOutcome, ostr);

            // fprintf(stderr, "%s %s\n", ostr.str().c_str(),
            // strOutcome.c_str());
            fprintf(fpOut, "%s %s\n", ostr.str().c_str(), strOutcome.c_str());
          }
        }
        delete pTree;
      }

      delete pAlign;
      iSentNum++;

      if (iSentNum % 100000 == 0) fprintf(stderr, "#%d\n", iSentNum);
    }

    fclose(fpOut);
    delete pAlignReader;
    delete pParseReader;
    delete pTxtSReader;
    delete pTxtTReader;
    delete[] pszLine;
  }
};

inline void print_options(std::ostream& out,
                          po::options_description const& opts) {
  typedef std::vector<boost::shared_ptr<po::option_description> > Ds;
  Ds const& ds = opts.options();
  out << '"';
  for (unsigned i = 0; i < ds.size(); ++i) {
    if (i) out << ' ';
    out << "--" << ds[i]->long_name();
  }
  out << '\n';
}
inline string str(char const* name, po::variables_map const& conf) {
  return conf[name].as<string>();
}

//--parse_file /scratch0/mt_exp/gq-ctb/data/train.srl.cn --align_file
/// scratch0/mt_exp/gq-ctb/data/aligned.grow-diag-final-and --source_file
/// scratch0/mt_exp/gq-ctb/data/train.cn --target_file
/// scratch0/mt_exp/gq-ctb/data/train.en --instance_file
/// scratch0/mt_exp/gq-ctb/data/srl-instance --model_prefix
/// scratch0/mt_exp/gq-ctb/data/srl-instance --feature_cutoff 10
int main(int argc, char** argv) {

  po::options_description opts("Configuration options");
  opts.add_options()("parse_file", po::value<string>(),
                     "parse file path (input)")(
      "align_file", po::value<string>(), "Alignment file path (input)")(
      "source_file", po::value<string>(), "Source text file path (input)")(
      "target_file", po::value<string>(), "Target text file path (input)")(
      "instance_file", po::value<string>(), "Instance file path (output)")(
      "model_prefix", po::value<string>(),
      "Model file path prefix (output): three files will be generated")(
          "feature_cutoff", po::value<int>()->default_value(100),
                  "Feature cutoff threshold")(
      "svm_option", po::value<string>(), "Parameters for SVMLight classifier")(
      "help", "produce help message");

  po::variables_map vm;
  if (argc) {
    po::store(po::parse_command_line(argc, argv, opts), vm);
    po::notify(vm);
  }

  if (vm.count("help")) {
    print_options(cout, opts);
    return 1;
  }

  if (!vm.count("parse_file") || !vm.count("align_file") ||
      !vm.count("source_file") || !vm.count("target_file") ||
      !vm.count("instance_file") || !vm.count("model_prefix")) {
    print_options(cout, opts);
    if (!vm.count("parse_file")) cout << "--parse_file NOT FOUND\n";
    if (!vm.count("align_file")) cout << "--align_file NOT FOUND\n";
    if (!vm.count("source_file")) cout << "--source_file NOT FOUND\n";
    if (!vm.count("target_file")) cout << "--target_file NOT FOUND\n";
    if (!vm.count("instance_file")) cout << "--instance_file NOT FOUND\n";
    if (!vm.count("model_prefix")) cout << "--model_prefix NOT FOUND\n";
    exit(0);
  }

  const char* pOption;
  if (vm.count("svm_option"))
    pOption = str("svm_option", vm).c_str();
  else
    pOption = NULL;

  SConstReorderTrainer* pTrainer = new SConstReorderTrainer(
      str("parse_file", vm).c_str(), str("align_file", vm).c_str(),
      str("source_file", vm).c_str(), str("target_file", vm).c_str(),
      str("instance_file", vm).c_str(), str("model_prefix", vm).c_str(),
      vm["feature_cutoff"].as<int>(), pOption);
  delete pTrainer;

  return 0;
}