@inproceedings{wei-etal-2025-legalcore,
    title = "{L}egal{C}ore: A Dataset for Event Coreference Resolution in Legal Documents",
    author = "Wei, Kangda  and
      Shi, Xi  and
      Tong, Jonathan  and
      Sai Ramana Reddy  and
      Natarajan, Anandhavelu  and
      Jain, Rajiv  and
      Garimella, Aparna  and
      Huang, Ruihong",
    editor = "Che, Wanxiang  and
      Nabende, Joyce  and
      Shutova, Ekaterina  and
      Pilehvar, Mohammad Taher",
    booktitle = "Findings of the Association for Computational Linguistics: ACL 2025",
    month = jul,
    year = "2025",
    address = "Vienna, Austria",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/landing_page/2025.findings-acl.1284/",
    pages = "25044--25059",
    ISBN = "979-8-89176-256-5",
    abstract = "Recognizing events and their coreferential mentions in a document is essential for understanding semantic meanings of text. The existing research on event coreference resolution is mostly limited to news articles. In this paper, we present the first dataset for the legal domain, LegalCore, which has been annotated with comprehensive event and event coreference information. The legal contract documents we annotated in this dataset are several times longer than news articles, with an average length of around 25k tokens per document. The annotations show that legal documents have dense event mentions and feature both short-distance and super long-distance coreference links between event mentions. We further benchmark mainstream Large Language Models (LLMs) on this dataset for both event detection and event coreference resolution tasks, and find that this dataset poses significant challenges for state-of-the-art open-source and proprietary LLMs, which perform significantly worse than a supervised baseline. We will publish the dataset as well as the code."
}