Rich bitext projection features for parse reranking

  • Authors:
  • Alexander Fraser;Renjing Wang;Hinrich Schütze

  • Affiliations:
  • University of Stuttgart;University of Stuttgart;University of Stuttgart

  • Venue:
  • EACL '09 Proceedings of the 12th Conference of the European Chapter of the Association for Computational Linguistics
  • Year:
  • 2009

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Abstract

Many different types of features have been shown to improve accuracy in parse reranking. A class of features that thus far has not been considered is based on a projection of the syntactic structure of a translation of the text to be parsed. The intuition for using this type of bitext projection feature is that ambiguous structures in one language often correspond to unambiguous structures in another. We show that reranking based on bitext projection features increases parsing accuracy significantly.