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How to Best Use Syntax in Semantic Role Labelling

Yufei Wang, Mark Johnson, Stephen Wan, Yifang Sun, Wei Wang


Abstract
There are many different ways in which external information might be used in a NLP task. This paper investigates how external syntactic information can be used most effectively in the Semantic Role Labeling (SRL) task. We evaluate three different ways of encoding syntactic parses and three different ways of injecting them into a state-of-the-art neural ELMo-based SRL sequence labelling model. We show that using a constituency representation as input features improves performance the most, achieving a new state-of-the-art for non-ensemble SRL models on the in-domain CoNLL’05 and CoNLL’12 benchmarks.
Anthology ID:
P19-1529
Volume:
Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2019
Address:
Florence, Italy
Editors:
Anna Korhonen, David Traum, Lluís Màrquez
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
5338–5343
Language:
URL:
https://aclanthology.org/P19-1529
DOI:
10.18653/v1/P19-1529
Bibkey:
Cite (ACL):
Yufei Wang, Mark Johnson, Stephen Wan, Yifang Sun, and Wei Wang. 2019. How to Best Use Syntax in Semantic Role Labelling. In Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, pages 5338–5343, Florence, Italy. Association for Computational Linguistics.
Cite (Informal):
How to Best Use Syntax in Semantic Role Labelling (Wang et al., ACL 2019)
Copy Citation:
PDF:
https://aclanthology.org/P19-1529.pdf
Code
 GaryYufei/bestParseSRL