CAWESumm: A Contextual and Anonymous Walk Embedding Based Extractive Summarization of Legal Bills

Deepali Jain, Malaya Dutta Borah, Anupam Biswas


Abstract
Extractive summarization of lengthy legal documents requires an appropriate sentence scoring mechanism. This mechanism should capture both the local semantics of a sentence as well as the global document-level context of a sentence. The search for an appropriate sentence embedding that can enable an effective scoring mechanism has been the focus of several research works in this domain. In this work, we propose an improved sentence embedding approach that combines a Legal Bert-based local embedding of the sentence with an anonymous random walk-based entire document embedding. Such combined features help effectively capture the local and global information present in a sentence. The experimental results suggest that the proposed sentence embedding approach can be very beneficial for the appropriate representation of sentences in legal documents, improving the sentence scoring mechanism required for extractive summarization of these documents.
Anthology ID:
2021.icon-main.50
Volume:
Proceedings of the 18th International Conference on Natural Language Processing (ICON)
Month:
December
Year:
2021
Address:
National Institute of Technology Silchar, Silchar, India
Editors:
Sivaji Bandyopadhyay, Sobha Lalitha Devi, Pushpak Bhattacharyya
Venue:
ICON
SIG:
Publisher:
NLP Association of India (NLPAI)
Note:
Pages:
414–422
Language:
URL:
https://aclanthology.org/2021.icon-main.50
DOI:
Bibkey:
Cite (ACL):
Deepali Jain, Malaya Dutta Borah, and Anupam Biswas. 2021. CAWESumm: A Contextual and Anonymous Walk Embedding Based Extractive Summarization of Legal Bills. In Proceedings of the 18th International Conference on Natural Language Processing (ICON), pages 414–422, National Institute of Technology Silchar, Silchar, India. NLP Association of India (NLPAI).
Cite (Informal):
CAWESumm: A Contextual and Anonymous Walk Embedding Based Extractive Summarization of Legal Bills (Jain et al., ICON 2021)
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PDF:
https://aclanthology.org/2021.icon-main.50.pdf
Data
BillSum