Priberam's question answering system in QA@CLEF 2008

Authors:
Carlos Amaral;Adán Cassan;Helena Figueira;André Martins;Afonso Mendes;Pedro Mendes;José Pina;Cláudia Pinto
Affiliations:
Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal;Priberam, Lisboa, Portugal
Venue:
CLEF'08 Proceedings of the 9th Cross-language evaluation forum conference on Evaluating systems for multilingual and multimodal information access
Year:
2008

Citing 5
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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.