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. © 2009 Springer Berlin Heidelberg.
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Amaral, C., Cassan, A., Figueira, H., Martins, A., Mendes, A., Mendes, P., … Pinto, C. (2009). Priberam’s question answering system in QA@CLEF 2008. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 5706 LNCS, pp. 337–344). https://doi.org/10.1007/978-3-642-04447-2_39
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