Higher-order constituent parsing and parser combination

  • Authors:
  • Xiao Chen;Chunyu Kit

  • Affiliations:
  • City University of Hong Kong, Kowloon, Hong Kong SAR, China;City University of Hong Kong, Kowloon, Hong Kong SAR, China

  • Venue:
  • ACL '12 Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics: Short Papers - Volume 2
  • Year:
  • 2012

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Abstract

This paper presents a higher-order model for constituent parsing aimed at utilizing more local structural context to decide the score of a grammar rule instance in a parse tree. Experiments on English and Chinese treebanks confirm its advantage over its first-order version. It achieves its best F1 scores of 91.86% and 85.58% on the two languages, respectively, and further pushes them to 92.80% and 85.60% via combination with other high-performance parsers.