LEAR

The implementation our EMNLP 2021 paper "Enhanced Language Representation with Label Knowledge for Span Extraction".

See below for an overview of the model architecture:

Requestments

• python 3.6
• pytorch 1.8
• transformers 3.9.2
• prefetch_generator
• tokenizers

Data

Note: The thunlp has updated the repo HMEAE recently, which causing the mismatch of data. Make sure you use the earlier version for ED task.

Task	Url	Rreprocess scripts
NER	mrc-for-flat-nested-ner	-
Event Detection	ACE 2005	HMEAE

Train

The details of hyper-parameter setting is listed in our paper - A.3.

• For NER task, run run_ner.py.
• For Event Detection task, run run_trigger_extraction.py

Evaluation

• Nested: set exist_nested=True.
• Flat: set span_decode_strategy=v5.