Abstract
Esfinge is a general domain Portuguese question answering system which has been participating at QA@CLEF since 2004. It uses the information available in the “official” document collections used in QA@CLEF (newspaper text and Wikipedia) and information from the Web as an additional resource when searching for answers. Where it regards the use of external tools, Esfinge uses a syntactic analyzer, a morphological analyzer and a named entity recognizer. This year an alternative approach to retrieve answers was tested: whereas in previous years, search patterns were used to retrieve relevant documents, this year a new type of search patterns was also used to extract the answers themselves. We also evaluated the second and third best answers returned by Esfinge. This evaluation showed that when Esfinge answers correctly a question, it does so usually with its first answer. Furthermore, the experiments revealed that the answer retrieval patterns created for this participation improve the results, but only for definition questions.
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Forner, P., Peñas, A., Alegria, I., Forăscu, C., Moreau, N., Osenova, P., Prokopidis, P., Rocha, P., Sacaleanu, B., Sutcliffe, R., Sang, E.T.K.: Overview of the CLEF 2008 Multilingual Question Answering Track. In: Peters, C., et al. (eds.) CLEF 2008. LNCS, vol. 5706, pp. 262–295. Springer, Heidelberg (2009)
Costa, L.: First Evaluation of Esfinge - a Question Answering System for Portuguese. In: Peters, C., Clough, P., Gonzalo, J., Jones, G.J.F., Kluck, M., Magnini, B. (eds.) CLEF 2004. LNCS, vol. 3491, pp. 522–533. Springer, Heidelberg (2005)
Costa, L.: 20th Century Esfinge (Sphinx) solving the riddles at CLEF 2005. In: Peters, C., Gey, F.C., Gonzalo, J., Müller, H., Jones, G.J.F., Kluck, M., Magnini, B., de Rijke, M., Giampiccolo, D. (eds.) CLEF 2005. LNCS, vol. 4022, pp. 467–476. Springer, Heidelberg (2006)
Costa, L.: Question answering beyond CLEF document collections. In: Peters, C., Clough, P., Gey, F.C., Karlgren, J., Magnini, B., Oard, D.W., de Rijke, M., Stempfhuber, M. (eds.) CLEF 2006. LNCS, vol. 4730, pp. 405–414. Springer, Heidelberg (2007)
Cabral, L.M., Costa, L.F., Santos, D.: What happened to Esfinge in 2007? In: Peters, C., Jijkoun, V., Mandl, T., Müller, H., Oard, D.W., Peñas, A., Petras, V., Santos, D. (eds.) CLEF 2007. LNCS, vol. 5152, pp. 261–268. Springer, Heidelberg (2008)
Bick, E.: The Parsing System "Palavras": Automatic Grammatical Analysis of Portuguese in a Constraint Grammar Framework. Aarhus University Press, Aarhus (2000)
Sarmento, L.: SIEMÊS - A Named Entity Recognizer for Portuguese Relying on Similarity Rules. In: Vieira, R., Quaresma, P., Nunes, M.d.G.V., Mamede, N.J., Oliveira, C., Dias, M.C. (eds.) PROPOR 2006. LNCS (LNAI), vol. 3960, pp. 90–99. Springer, Heidelberg (2006)
Simões, A.M., Almeida, J.J.: Jspell.pm - um módulo de análise morfológica para uso em Processamento de Linguagem Natural. In: Gonçalves, A., Correia, C.N. (eds.) Actas do XVII Encontro Nacional da Associação Portuguesa de Linguística (APL 2001) (Lisboa, 2-4 de Outubro de 2001), pp. 485–495. APL, Lisboa (2001)
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Costa, L.F. (2009). Using Answer Retrieval Patterns to Answer Portuguese Questions. In: Peters, C., et al. Evaluating Systems for Multilingual and Multimodal Information Access. CLEF 2008. Lecture Notes in Computer Science, vol 5706. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04447-2_42
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DOI: https://doi.org/10.1007/978-3-642-04447-2_42
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