A structured model for joint learning of argument roles and predicate senses

  • Authors:
  • Yotaro Watanabe;Masayuki Asahara;Yuji Matsumoto

  • Affiliations:
  • Tohoku University, Aoba-ku, Sendai, Japan;Nara Institute of Science and Technology, Ikoma, Nara, Japan;Nara Institute of Science and Technology, Ikoma, Nara, Japan

  • Venue:
  • ACLShort '10 Proceedings of the ACL 2010 Conference Short Papers
  • Year:
  • 2010

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Abstract

In predicate-argument structure analysis, it is important to capture non-local dependencies among arguments and inter-dependencies between the sense of a predicate and the semantic roles of its arguments. However, no existing approach explicitly handles both non-local dependencies and semantic dependencies between predicates and arguments. In this paper we propose a structured model that overcomes the limitation of existing approaches; the model captures both types of dependencies simultaneously by introducing four types of factors including a global factor type capturing non-local dependencies among arguments and a pairwise factor type capturing local dependencies between a predicate and an argument. In experiments the proposed model achieved competitive results compared to the state-of-the-art systems without applying any feature selection procedure.