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Priberam’s Question Answering System in QA@CLEF 2008

  • Carlos Amaral
  • Adán Cassan
  • Helena Figueira
  • André Martins
  • Afonso Mendes
  • Pedro Mendes
  • José Pina
  • Cláudia Pinto
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5706)

Abstract

This paper describes the changes implemented in Priberam’s question answering (QA) system, followed by the discussion of the results obtained in Portuguese and Spanish monolingual runs at QA@CLEF 2008. We enhanced the syntactic analysis of the question and improved the indexing process by using question categories at the sentence retrieval level. The fine-tuning of the syntactic analysis allowed the system to more precisely match the pivots of the question with their counterparts in the answer. As a result, in QA@CLEF 2008, Priberam’s system achieved a considerable overall accuracy increase in the Portuguese run.

Keywords

Question answering Query Expansion 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Carlos Amaral
    • 1
  • Adán Cassan
    • 1
  • Helena Figueira
    • 1
  • André Martins
    • 1
  • Afonso Mendes
    • 1
  • Pedro Mendes
    • 1
  • José Pina
    • 1
  • Cláudia Pinto
    • 1
  1. 1.Priberam, Alameda D. Afonso HenriquesLisboaPortugal

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