SynSetExpan: An Iterative Framework for Joint Entity Set Expansion and Synonym Discovery

Jiaming Shen, Wenda Qiu, Jingbo Shang, Michelle Vanni, Xiang Ren, Jiawei Han


Abstract
Entity set expansion and synonym discovery are two critical NLP tasks. Previous studies accomplish them separately, without exploring their interdependencies. In this work, we hypothesize that these two tasks are tightly coupled because two synonymous entities tend to have a similar likelihood of belonging to various semantic classes. This motivates us to design SynSetExpan, a novel framework that enables two tasks to mutually enhance each other. SynSetExpan uses a synonym discovery model to include popular entities’ infrequent synonyms into the set, which boosts the set expansion recall. Meanwhile, the set expansion model, being able to determine whether an entity belongs to a semantic class, can generate pseudo training data to fine-tune the synonym discovery model towards better accuracy. To facilitate the research on studying the interplays of these two tasks, we create the first large-scale Synonym-Enhanced Set Expansion (SE2) dataset via crowdsourcing. Extensive experiments on the SE2 dataset and previous benchmarks demonstrate the effectiveness of SynSetExpan for both entity set expansion and synonym discovery tasks.
Anthology ID:
2020.emnlp-main.666
Volume:
Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP)
Month:
November
Year:
2020
Address:
Online
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
8292–8307
Language:
URL:
https://aclanthology.org/2020.emnlp-main.666
DOI:
10.18653/v1/2020.emnlp-main.666
Bibkey:
Cite (ACL):
Jiaming Shen, Wenda Qiu, Jingbo Shang, Michelle Vanni, Xiang Ren, and Jiawei Han. 2020. SynSetExpan: An Iterative Framework for Joint Entity Set Expansion and Synonym Discovery. In Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP), pages 8292–8307, Online. Association for Computational Linguistics.
Cite (Informal):
SynSetExpan: An Iterative Framework for Joint Entity Set Expansion and Synonym Discovery (Shen et al., EMNLP 2020)
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PDF:
https://aclanthology.org/2020.emnlp-main.666.pdf
Video:
 https://slideslive.com/38938838