WAT 2015

The 2nd Workshop on Asian Translation

Baseline Systems

Data preparation for the JE and EJ subtasks

Setup

MOSES_SCRIPT=${path}/mosesdecoder-RELEASE-2.1.1/scripts
SCRIPT_DIR=${path}/script.converter.distribution


cd corpus.org/


Extracting sentences

for name in dev test; do
  perl -ne 'chomp; @a=split/ \|\|\| /; print $a[2], "\n";' < ${name}.txt > ${name}.ja.txt
  perl -ne 'chomp; @a=split/ \|\|\| /; print $a[3], "\n";' < ${name}.txt > ${name}.en.txt
done
for name in train-1 train-2 train-3; do
  perl -ne 'chomp; @a=split/ \|\|\| /; print $a[3], "\n";' < ${name}.txt > ${name}.ja.txt
  perl -ne 'chomp; @a=split/ \|\|\| /; print $a[4], "\n";' < ${name}.txt > ${name}.en.txt
done


(Removing date expressions at EOS in Japanese in the training and development data to reduce noise)

for file in train-1 train-2 train-3 dev; do
  mv ${file}.ja.txt ${file}.ja.txt.org
  cat ${file}.ja.txt.org | perl -Mencoding=utf8 -pe 's/(.)［[０-９．]+］$/${1}/;' > ${file}.ja.txt
done

cd ..


For Phrase-based and Hierarchical Phrase-based SMT

mkdir corpus.tok
cd corpus.tok


Tokenizing sentences in Japanese

for file in train-1 train-2 train-3 dev test; do
cat ../corpus.org/${file}.ja.txt | \
  perl -Mencoding=utf8 -pe 's/　/ /g;' | \
    juman -b | \
    perl -ne 'chomp; if($_ eq "EOS"){print join(" ",@b),"\n"; @b=();} else {@a=split/ /; push @b, $a[0];}' | \
    perl -pe 's/^ +//; s/ +$//; s/ +/ /g;' | \
    perl -Mencoding=utf8 -pe 'tr/\|[]/｜［］/; ' \
    > ${file}.ja
done


Tokenizing sentences in English

for file in train-1 train-2 train-3 dev test; do
  cat ../corpus.org/${file}.en.txt | \
    perl ${SCRIPT_DIR}/z2h-utf8.pl | \
    perl ${MOSES_SCRIPT}/tokenizer/tokenizer.perl -l en \
    > ${file}.tok.en
done


Training truecaser for English

cat train-1.tok.en train-2.tok.en train-3.tok.en dev.tok.en > train_dev.tok.en
${MOSES_SCRIPT}/recaser/train-truecaser.perl --model truecase-model.en --corpus train_dev.tok.en


Truecasing English sentences

for file in train-1 train-2 train-3 dev test; do
  ${MOSES_SCRIPT}/recaser/truecase.perl --model truecase-model.en < ${file}.tok.en > ${file}.en
done


Building training data for language models

cat train-1.ja train-2.ja train-3.ja > train-all.ja
cat train-1.en train-2.en train-3.en > train-all.en


Cleaning training data for translation models

perl ${MOSES_SCRIPT}/training/clean-corpus-n.perl train-1 ja en train-clean 1 40

cd ..


For String-to-Tree and Tree-to-String SMT

mkdir corpus.tree
cd corpus.tree
for file in train-1 dev test; do
  ln -s ../corpus.tok/${file}.ja
done


Tokenizing sentences in English

for file in train-1 train-2 train-3 dev test; do
  cat ../corpus.org/${file}.en.txt | \
    perl ${SCRIPT_DIR}/z2h-utf8.pl | \
    perl ${MOSES_SCRIPT}/tokenizer/tokenizer.perl -l en -penn \
    > ${file}.tok.en
done


Training truecaser for English

cat train-1.tok.en train-2.tok.en train-3.tok.en dev.tok.en > train_dev.tok.en
${MOSES_SCRIPT}/recaser/train-truecaser.perl --model truecase-model.en --corpus train_dev.tok.en


Truecasing English sentences

for file in train-1 train-2 train-3; do
  ${MOSES_SCRIPT}/recaser/truecase.perl --model truecase-model.en < ${file}.tok.en > ${file}.en
done


Building training data for a language model

cat train-1.en train-2.en train-3.en | perl -pe 's/\-LRB\-/\(/g; s/\-RRB\-/\)/g;' > train-all.en


Parsing English sentences

ln -s train-1.ja train-1.tok.ja
perl ${MOSES_SCRIPT}/training/clean-corpus-n.perl train-1.tok ja en train.reduced.tok 1 40

for file in train.reduced dev test; do
  cat ${file}.tok.en | \
    perl ${MOSES_SCRIPT}/training/wrappers/parse-de-berkeley.perl \
    -binarize \
    -ja ${path}/BerkeleyParser-1.7/BerkeleyParser-1.7.jar \
    -gr ${path}/BerkeleyParser-1.7/eng_sm6.gr \
    > ${file}.tok.xml.en
done


Cleaning training data for translation models

ln -s train.reduced.tok.ja train.reduced.tok.xml.ja
perl ${MOSES_SCRIPT}/training/clean-corpus-n.perl \
  train.reduced.tok.xml ja en \
  train-clean.tok.xml 1 40 \
  --ignore-xml


Truecasing English sentences

for file in train-clean dev test; do
  ${MOSES_SCRIPT}/recaser/truecase.perl --model truecase-model.en < ${file}.tok.xml.en > ${file}.en
done

ln -s train-clean.tok.xml.ja train-clean.ja

cd ..

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JST (Japan Science and Technology Agency)
NICT (National Institute of Information and Communications Technology)
Kyoto University
Last Modified: 2015-02-26