Hierarchical Coordinate Structure Analysis for Japanese Statutory Sentences Using Neural Language Models

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  • Yamakoshi Takahiro
    Graduate School of Informatics, Nagoya University
  • Ohno Tomohiro
    Graduate School of Advanced Science and Technology, Tokyo Denki University
  • Ogawa Yasuhiro
    Graduate School of Informatics, Nagoya University Information Technology Center, Nagoya University
  • Nakamura Makoto
    Department of Engineering, Niigata Institute of Technology
  • Toyama Katsuhiko
    Graduate School of Informatics, Nagoya University Information Technology Center, Nagoya University

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<p>We propose a method for analyzing the hierarchical coordinate structure of Japanese statutory sentences using neural language models (NLMs). Our method deterministically identifies hierarchical coordinate structures according to their rigorously defined descriptive rules. In addition, our method identifies all conjuncts in each coordinate structure using NLM-based scoring. Furthermore, it does not rely on any training data labeled with coordinate structures. An experiment demonstrates that our method drastically outperforms an existing method for Japanese statutory sentences.</p>

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