Chinese dependency parsing with large scale automatically constructed case structures

  • Authors:
  • Kun Yu;Daisuke Kawahara;Sadao Kurohashi

  • Affiliations:
  • Kyoto University, Japan;National Institute of Information and Communications Technology, Japan;Kyoto University, Japan

  • Venue:
  • COLING '08 Proceedings of the 22nd International Conference on Computational Linguistics - Volume 1
  • Year:
  • 2008

Quantified Score

Hi-index 0.01

Visualization

Abstract

This paper proposes an approach using large scale case structures, which are automatically constructed from both a small tagged corpus and a large raw corpus, to improve Chinese dependency parsing. The case structure proposed in this paper has two characteristics: (1) it relaxes the predicate of a case structure to be all types of words which behaves as a head; (2) it is not categorized by semantic roles but marked by the neighboring modifiers attached to a head. Experimental results based on Penn Chinese Treebank show the proposed approach achieved 87.26% on unlabeled attachment score, which significantly outperformed the baseline parser without using case structures.