Facilitating Contrastive Learning of Discourse Relational Senses by Exploiting the Hierarchy of Sense Relations

Wanqiu Long, Bonnie Webber


Abstract
Implicit discourse relation recognition is a challenging task that involves identifying the sense or senses that hold between two adjacent spans of text, in the absense of an explicit connective between them. In both PDTB-2 (prasad et al., 2008) and PDTB-3 (Webber et al., 2019), discourse relational senses are organized into a three-level hierarchy ranging from four broad top-level senses, to more specific senses below them. Most previous work on implicitf discourse relation recognition have used the sense hierarchy simply to indicate what sense labels were available. Here we do more — incorporating the sense hierarchy into the recognition process itself and using it to select the negative examples used in contrastive learning. With no additional effort, the approach achieves state-of-the-art performance on the task. Our code is released in https://github.com/wanqiulong0923/Contrastive_IDRR.
Anthology ID:
2022.emnlp-main.734
Volume:
Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing
Month:
December
Year:
2022
Address:
Abu Dhabi, United Arab Emirates
Editors:
Yoav Goldberg, Zornitsa Kozareva, Yue Zhang
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
10704–10716
Language:
URL:
https://aclanthology.org/2022.emnlp-main.734
DOI:
10.18653/v1/2022.emnlp-main.734
Bibkey:
Cite (ACL):
Wanqiu Long and Bonnie Webber. 2022. Facilitating Contrastive Learning of Discourse Relational Senses by Exploiting the Hierarchy of Sense Relations. In Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing, pages 10704–10716, Abu Dhabi, United Arab Emirates. Association for Computational Linguistics.
Cite (Informal):
Facilitating Contrastive Learning of Discourse Relational Senses by Exploiting the Hierarchy of Sense Relations (Long & Webber, EMNLP 2022)
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PDF:
https://aclanthology.org/2022.emnlp-main.734.pdf