pasinit/context2vec

PyTorch implementation of context2vec from Melamud et al., CoNLL 2016

context2vec: Learning Generic Context Embedding with Bidirectional LSTM, Melamud et al., CoNLL 2016

This is a PyTorch implementation of Context2Vec that learns context vectors utilizing bi-directional LSTM.

Requirements

Framework

• python (<= 3.6)
• pytorch (<= 0.4.1)

Packages

• torchtext
• nltk

Quick Run

Train

python -m src --train

which means running on cpu and learning context vectors from a small piece of penn tree bank (that is in the repository). The learned model and the embedding file are stored at models/model.param and models/embedding.vec respectively. (Note that you have to put flag --train if you want to train the model. Otherwise you might be on an inference mode.)

Inference

python -m src
>> I am a [] .

(Note that you might not get a good result if you use the model that learns from a part of penn tree bank (i.e. dataset/sample.txt) because it does not contain enough data for learning context vectors. The reason why I put this sample in the repository is that you can easily check whether this program could actually work.)

Running with GPU and other settings

Train

Running on GPU_ID 0 using INPUT_FILE and output embedding file on OUTPUT_EMBEDDING_FILE and model parameters on MODEL_FILE. (The other detailed settings are set by config.toml)

python -m src -g 0 -i INPUT_FILE -w OUTPUT_EMBEDDING_FILE -m MODEL_FILE --train

Inference

python -m src -w WORD_EMBEDDING_FILE -m MODEL_FILE

Performance

Training Speed

There is approximatitely 3x speed up compared to the original implementation.

MSR Sentence Completion

After setting your question/answer file in config.toml, run

python -m src --task mscc -w WORD_EMBEDDING_FILE -m MODEL_FILE

-	Reported score	This implementation
TEST	64.0	65.9
ALL	65.1	65.8

Reference

• The original implementation (written in Chainer) by the author can be found here.

@InProceedings{K16-1006,
  author = 	"Melamud, Oren
		and Goldberger, Jacob
		and Dagan, Ido",
  title = 	"context2vec: Learning Generic Context Embedding with Bidirectional LSTM",
  booktitle = 	"Proceedings of The 20th SIGNLL Conference on Computational Natural Language Learning",
  year = 	"2016",
  publisher = 	"Association for Computational Linguistics",
  pages = 	"51--61",
  location = 	"Berlin, Germany",
  doi = 	"10.18653/v1/K16-1006",
  url = 	"http://www.aclweb.org/anthology/K16-1006"
}