Enhancing Relation Extraction via Adversarial Multi-task Learning

Han Qin, Yuanhe Tian, Yan Song


Abstract
Relation extraction (RE) is a sub-field of information extraction, which aims to extract the relation between two given named entities (NEs) in a sentence and thus requires a good understanding of contextual information, especially the entities and their surrounding texts. However, limited attention is paid by most existing studies to re-modeling the given NEs and thus lead to inferior RE results when NEs are sometimes ambiguous. In this paper, we propose a RE model with two training stages, where adversarial multi-task learning is applied to the first training stage to explicitly recover the given NEs so as to enhance the main relation extractor, which is trained alone in the second stage. In doing so, the RE model is optimized by named entity recognition (NER) and thus obtains a detailed understanding of entity-aware context. We further propose the adversarial mechanism to enhance the process, which controls the effect of NER on the main relation extractor and allows the extractor to benefit from NER while keep focusing on RE rather than the entire multi-task learning. Experimental results on two English benchmark datasets for RE demonstrate the effectiveness of our approach, where state-of-the-art performance is observed on both datasets.
Anthology ID:
2022.lrec-1.666
Volume:
Proceedings of the Thirteenth Language Resources and Evaluation Conference
Month:
June
Year:
2022
Address:
Marseille, France
Editors:
Nicoletta Calzolari, Frédéric Béchet, Philippe Blache, Khalid Choukri, Christopher Cieri, Thierry Declerck, Sara Goggi, Hitoshi Isahara, Bente Maegaard, Joseph Mariani, Hélène Mazo, Jan Odijk, Stelios Piperidis
Venue:
LREC
SIG:
Publisher:
European Language Resources Association
Note:
Pages:
6190–6199
Language:
URL:
https://aclanthology.org/2022.lrec-1.666
DOI:
Bibkey:
Cite (ACL):
Han Qin, Yuanhe Tian, and Yan Song. 2022. Enhancing Relation Extraction via Adversarial Multi-task Learning. In Proceedings of the Thirteenth Language Resources and Evaluation Conference, pages 6190–6199, Marseille, France. European Language Resources Association.
Cite (Informal):
Enhancing Relation Extraction via Adversarial Multi-task Learning (Qin et al., LREC 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.lrec-1.666.pdf
Code
 synlp/re-amt