TeamUnibo at SemEval-2023 Task 6: A transformer based approach to Rhetorical Roles prediction and NER in Legal Texts

Yuri Noviello, Enrico Pallotta, Flavio Pinzarrone, Giuseppe Tanzi


Abstract
This study aims to tackle some challenges posed by legal texts in the field of NLP. The LegalEval challenge proposes three tasks, based on Indial Legal documents: Rhetorical Roles Prediction, Legal Named Entity Recognition, and Court Judgement Prediction with Explanation. Our work focuses on the first two tasks. For the first task we present a context-aware approach to enhance sentence information. With the help of this approach, the classification model utilizing InLegalBert as a transformer achieved 81.12% Micro-F1. For the second task we present a NER approach to extract and classify entities like names of petitioner, respondent, court or statute of a given document. The model utilizing XLNet as transformer and a dependency parser on top achieved 87.43% Macro-F1.
Anthology ID:
2023.semeval-1.37
Volume:
Proceedings of the 17th International Workshop on Semantic Evaluation (SemEval-2023)
Month:
July
Year:
2023
Address:
Toronto, Canada
Editors:
Atul Kr. Ojha, A. Seza Doğruöz, Giovanni Da San Martino, Harish Tayyar Madabushi, Ritesh Kumar, Elisa Sartori
Venue:
SemEval
SIG:
SIGLEX
Publisher:
Association for Computational Linguistics
Note:
Pages:
275–284
Language:
URL:
https://aclanthology.org/2023.semeval-1.37
DOI:
10.18653/v1/2023.semeval-1.37
Bibkey:
Cite (ACL):
Yuri Noviello, Enrico Pallotta, Flavio Pinzarrone, and Giuseppe Tanzi. 2023. TeamUnibo at SemEval-2023 Task 6: A transformer based approach to Rhetorical Roles prediction and NER in Legal Texts. In Proceedings of the 17th International Workshop on Semantic Evaluation (SemEval-2023), pages 275–284, Toronto, Canada. Association for Computational Linguistics.
Cite (Informal):
TeamUnibo at SemEval-2023 Task 6: A transformer based approach to Rhetorical Roles prediction and NER in Legal Texts (Noviello et al., SemEval 2023)
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PDF:
https://aclanthology.org/2023.semeval-1.37.pdf