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Zero-Shot Information Extraction as a Unified Text-to-Triple Translation

Source code repo for paper Zero-Shot Information Extraction as a Unified Text-to-Triple Translation, EMNLP 2021.

Installation

git clone --recursive git@github.com:cgraywang/deepex.git
cd ./deepex
conda create --name deepex python=3.7 -y
conda activate deepex
pip install -r requirements.txt
pip install -e .

Requires PyTorch version 1.5.1 or above with CUDA. PyTorch 1.7.1 with CUDA 10.1 is tested. Please refer to https://pytorch.org/get-started/locally/ for installing PyTorch.

Dataset Preparation

Relation Classification

FewRel

You can add --prepare-rc-dataset argument when running the scripts in this section, which would allow the script to automatically handle the preparation of FewRel dataset.

Or, you could manually download and prepare the FewRel dataset using the following script:

bash scripts/rc/prep_FewRel.sh

The processed data will be stored at data/FewRel/data.jsonl.

TACRED

TACRED is licensed under LDC, please first download TACRED dataset from link. The downloaded file should be named as tacred_LDC2018T24.tgz.

After downloading and correctly naming the tacred .tgz data file, you can add --prepare-rc-dataset argument when running the scripts in this section, which would allow the script to automatically handle the preparation of TACRED dataset.

Or, you could manually download and prepare the TACRED dataset using the following script:

bash scripts/rc/prep_TACRED.sh

The processed data will be stored at data/TACRED/data.jsonl.

Scripts for Reproducing Results

This section contains the scripts for running the tasks with default setting (e.g.: using model bert-large-cased, using 8 CUDA devices with per-device batch size equal to 4).

To modify the settings, please checkout this section.

Open Information Extraction

bash tasks/OIE_2016.sh

bash tasks/PENN.sh

bash tasks/WEB.sh

bash tasks/NYT.sh

Relation Classification

bash tasks/FewRel.sh

bash tasks/TACRED.sh

Arguments

General script:

python scripts/manager.py --task=<task_name> <other_args>

The default setting is:

python scripts/manager.py --task=<task_name> --model="bert-large-cased" --beam-size=6
                          --max-distance=2048 --batch-size-per-device=4 --stage=0
                          --cuda=0,1,2,3,4,5,6,7

All tasks are already implemented as above .sh files in tasks/, using the default arguments.

The following are the most important command-line arguments for the scripts/manager.py script:

• --task: The task to be run, supported tasks are OIE_2016, WEB, NYT, PENN, FewRel and TACRED.
• --model: The pre-trained model type to be used for generating attention matrices to perform beam search on, supported models are bert-base-cased and bert-large-cased.
• --beam-size: The beam size during beam search.
• --batch-size-per-device: The batch size on a single device.
• --stage: Run task starting from an intermediate stage:
  • --stage=0: data preparation and beam-search
  • --stage=1: post processing
  • --stage=2: ranking
  • --stage=3: evaluation
• --prepare-rc-dataset: If true, automatically run the relation classification dataset preparation scripts. Notice that this argument should be turned on only for relation classification tasks (i.e.: FewRel and TACRED).
• --cuda: Specify CUDA gpu devices.

Run python scripts/manager.py -h for the full list.

Results

NOTE

We are able to obtain improved or same results compared to the paper's results. We will release the code and datasets for factual probe soon!

Related Work

We implement an extended version of the beam search algorithm proposed in Language Models are Open Knowledge Graphs in src/deepex/model/kgm.py.

Citation

@inproceedings{wang-etal-2021-deepex,
    title = "Zero-Shot Information Extraction as a Unified Text-to-Triple Translation",
    author = "Chenguang Wang and Xiao Liu and Zui Chen and Haoyun Hong and Jie Tang and Dawn Song",
    booktitle = "Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing",
    year = "2021",
    publisher = "Association for Computational Linguistics"
}

@article{wang-etal-2020-language,
    title = "Language Models are Open Knowledge Graphs",
    author = "Chenguang Wang and Xiao Liu and Dawn Song",
    journal = "arXiv preprint arXiv:2010.11967",
    year = "2020"
}