@inproceedings{f77db9ecfa49439d8f10dd333fe324a2,
title = "Joint Span Segmentation and Rhetorical Role Labeling with Data Augmentation for Legal Documents",
abstract = "Segmentation and Rhetorical Role Labeling of legal judgements play a crucial role in retrieval and adjacent tasks, including case summarization, semantic search, argument mining etc. Previous approaches have formulated this task either as independent classification or sequence labeling of sentences. In this work, we reformulate the task at span level as identifying spans of multiple consecutive sentences that share the same rhetorical role label to be assigned via classification. We employ semi-Markov Conditional Random Fields (CRF) to jointly learn span segmentation and span label assignment. We further explore three data augmentation strategies to mitigate the data scarcity in the specialized domain of law where individual documents tend to be very long and annotation cost is high. Our experiments demonstrate improvement of span-level prediction metrics with a semi-Markov CRF model over a CRF baseline. This benefit is contingent on the presence of multi sentence spans in the document.",
keywords = "Data augmentation, Rhetorical Role Labeling, Semi-Markov CRF",
author = "Santosh, {T. Y.S.S.} and Philipp Bock and Matthias Grabmair",
note = "Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.; 45th European Conference on Information Retrieval, ECIR 2023 ; Conference date: 02-04-2023 Through 06-04-2023",
year = "2023",
doi = "10.1007/978-3-031-28238-6_54",
language = "English",
isbn = "9783031282379",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "627--636",
editor = "Jaap Kamps and Lorraine Goeuriot and Fabio Crestani and Maria Maistro and Hideo Joho and Brian Davis and Cathal Gurrin and Annalina Caputo and Udo Kruschwitz",
booktitle = "Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Proceedings",
}