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Priberam’s Question Answering System in QA@CLEF 2008

2009; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-642-04447-2_39

1611-3349

Carlos Amaral, Adán Cassan, Helena Andrade Figueira, André F. T. Martins, Afonso Mendes, Pedro Mendes, José Antonio López Pina, Cláudia Pinto,

Speech and dialogue systems

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.