Coarse-to-Fine n-Best Parsing and MaxEnt Discriminative Reranking

Eugene Charniak,Mark Johnson

Published 2005 in Annual Meeting of the Association for Computational Linguistics

ABSTRACT

Discriminative reranking is one method for constructing high-performance statistical parsers (Collins, 2000). A discriminative reranker requires a source of candidate parses for each sentence. This paper describes a simple yet novel method for constructing sets of 50-best parses based on a coarse-to-fine generative parser (Charniak, 2000). This method generates 50-best lists that are of substantially higher quality than previously obtainable. We used these parses as the input to a MaxEnt reranker (Johnson et al., 1999; Riezler et al., 2002) that selects the best parse from the set of parses for each sentence, obtaining an f-score of 91.0% on sentences of length 100 or less.

PUBLICATION RECORD

  • Publication year

    2005

  • Venue

    Annual Meeting of the Association for Computational Linguistics

  • Publication date

    2005-06-25

  • Fields of study

    Computer Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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