Feature_CRF_AE
Feature_CRF_AE provides a implementation of Bridging Pre-trained Language Models and Hand-crafted Features for Unsupervised POS Tagging:
@inproceedings{zhou-etal-2022-Bridging,
title = {Bridging Pre-trained Language Models and Hand-crafted Features for Unsupervised POS Tagging},
author = {Zhou, houquan and Li, yang and Li, Zhenghua and Zhang Min},
booktitle = {Findings of ACL},
year = {2022},
url = {?},
pages = {?--?}
}
Please concact Jacob_Zhou \at outlook.com if you have any questions.
Contents
Installation
Feature_CRF_AE can be installing from source:
$ git clone https://github.com/Jacob-Zhou/FeatureCRFAE && cd FeatureCRFAE
$ bash scripts/setup.sh
The following requirements will be installed in scripts/setup.sh:
python: 3.7allennlp: 1.2.2pytorch: 1.6.0transformers: 3.5.1h5py: 3.1.0matplotlib: 3.3.1nltk: 3.5numpy: 1.19.1overrides: 3.1.0scikit_learn: 1.0.2seaborn: 0.11.0tqdm: 4.49.0
For WSJ data, we use the ELMo representations of elmo_2x4096_512_2048cnn_2xhighway_5.5B from AllenNLP. For UD data, we use the ELMo representations released by HIT-SCIR.
The corresponding data and ELMo models can be download as follows:
# 1) UD data and ELMo models:
$ bash scripts/prepare_data.sh
# 2) UD data, ELMo models as well as WSJ data
# [please replace ~/treebank3/parsed/mrg/wsj/ with your path to LDC99T42]
$ bash scripts/prepare_data.sh ~/treebank3/parsed/mrg/wsj/
Performance
WSJ-All
| Seed | M-1 | 1-1 | VM |
|---|---|---|---|
| 0 | 84.29 | 70.03 | 78.43 |
| 1 | 82.34 | 64.42 | 77.27 |
| 2 | 84.68 | 62.78 | 77.83 |
| 3 | 82.55 | 65.00 | 77.35 |
| 4 | 82.20 | 66.69 | 77.33 |
| Avg. | 83.21 | 65.78 | 77.64 |
| Std. | 1.18 | 2.75 | 0.49 |
WSJ-Test
| Seed | M-1 | 1-1 | VM |
|---|---|---|---|
| 0 | 81.99 | 64.84 | 76.86 |
| 1 | 82.52 | 61.46 | 76.13 |
| 2 | 82.33 | 61.15 | 75.13 |
| 3 | 78.11 | 58.80 | 72.94 |
| 4 | 82.05 | 61.68 | 76.21 |
| Avg. | 81.40 | 61.59 | 75.45 |
| Std. | 1.85 | 2.15 | 1.54 |
Usage
We give some examples on scripts/examples.sh. Before run the code you should activate the virtual environment by:
$ . scripts/set_environment.sh
Training
To train a model from scratch, it is preferred to use the command-line option, which is more flexible and customizable. Here are some training examples:
$ python -u -m tagger.cmds.crf_ae train \
--conf configs/crf_ae.ini \
--encoder elmo \
--plm elmo_models/allennlp/elmo_2x4096_512_2048cnn_2xhighway_5.5B \
--train data/wsj/total.conll \
--evaluate data/wsj/total.conll \
--path save/crf_ae_wsj
$ python -u -m tagger.cmds.crf_ae train \
--conf configs/crf_ae.ini \
--ud-mode \
--ud-feature \
--ignore-capitalized \
--language-specific-strip \
--feat-min-freq 14 \
--language de \
--encoder elmo \
--plm elmo_models/de \
--train data/ud/de/total.conll \
--evaluate data/ud/de/total.conll \
--path save/crf_ae_de
For more instructions on training, please type python -m tagger.cmds.[crf_ae|feature_hmm] train -h.
Alternatively, We provides some equivalent command entry points registered in setup.py: crf-ae and feature-hmm.
$ crf-ae train \
--conf configs/crf_ae.ini \
--encoder elmo \
--plm elmo_models/allennlp/elmo_2x4096_512_2048cnn_2xhighway_5.5B \
--train data/wsj/total.conll \
--evaluate data/wsj/total.conll \
--path save/crf_ae
Evaluation
$ python -u -m tagger.cmds.crf_ae evaluate \
--conf configs/crf_ae.ini \
--encoder elmo \
--plm elmo_models/allennlp/elmo_2x4096_512_2048cnn_2xhighway_5.5B \
--data data/wsj/total.conll \
--path save/crf_ae
Predict
$ python -u -m tagger.cmds.crf_ae predict \
--conf configs/crf_ae.ini \
--encoder elmo \
--plm elmo_models/allennlp/elmo_2x4096_512_2048cnn_2xhighway_5.5B \
--data data/wsj/total.conll \
--path save/crf_ae \
--pred save/crf_ae/pred.conll
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