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A Two-Step Zero Pronoun Resolution by Reducing Candidate Cardinality

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Part of the Lecture Notes in Computer Science book series (LNAI,volume 7458)

Abstract

The high cardinality of antecedent candidates is one of the major reasons which make zero pronoun resolution difficult. To improve performance, it is necessary to reduce this cardinality before defining the features to choose the most plausible antecedent. This paper proposes a two-step method for intra-sentential zero pronoun resolution. First, the clause which contain the antecedent for a given zero pronoun is determined using structural relationships between clauses. Then, the antecedent of the zero pronoun is chosen from the noun phrases within the identified clause. The cardinality of candidates reduces to the number of antecedent candidates present in clauses. Our experimental results show that the proposed method outperforms other methods without the first step, no matter what features are used to identify antecedents.

Keywords

  • zero pronoun
  • candidate cardinality
  • hierarchy of linguistic units
  • relationship between clauses

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Kim, KS., Choi, SJ., Park, SB., Lee, SJ. (2012). A Two-Step Zero Pronoun Resolution by Reducing Candidate Cardinality. In: Anthony, P., Ishizuka, M., Lukose, D. (eds) PRICAI 2012: Trends in Artificial Intelligence. PRICAI 2012. Lecture Notes in Computer Science(), vol 7458. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32695-0_19

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  • DOI: https://doi.org/10.1007/978-3-642-32695-0_19

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-32694-3

  • Online ISBN: 978-3-642-32695-0

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