Parsing Data Generation for WSJ

1. Place a copy of the Penn Treebank (LDC99T42) in corpora/treebank_3. After doing this, corpora/treebank_3/parsed/mrg/wsj should have folders named 00-24.
2. Ensure that the active version of Python has nltk installed. Python 2.7 and Python 3 should both work.
3. cd corpora/wsj && ./build_corpus.sh

Processed trees are written to the following files:

• corpora/wsj/train.gold.stripped
• corpora/wsj/dev.gold.stripped
• corpora/wsj/test.gold.stripped