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Comparison and Evaluation of Two Approaches of a Multilayered QA System Applied to Temporality

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Advances in Natural Language Processing (EsTAL 2004)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 3230))

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Abstract

This paper compares two approaches to a multilayered Question Answering (QA) architecture suitable for enhancing current QA capabilities with the possibility of processing complex questions. That is, questions whose answer needs to be gathered from pieces of factual information that is scattered in different documents. Specifically, we have designed a layer oriented to process the different types of temporal questions. In the first approach, complex temporal questions are decomposed into simple questions, according to the temporal relations expressed in the original question. In the same way, the answers of each resulting simple question are recomposed, fulfilling the temporal restrictions of the original complex question. In the second approach, temporal information is added to the sub-questions before being processed. Evaluation results show that the second approach outperforms the first one in a 30%.

This paper has been supported by the Spanish government, projects FIT-150500-2002-244, FIT-150500-2002-416, TIC-2003-07158-C04-01 and TIC2000-0664-C02-02.

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Authors and Affiliations

  1. Grupo de investigación del Procesamiento del Lenguaje y Sistemas de Información, Departamento de Lenguajes y Sistemas Informáticos, Universidad de Alicante, Alicante, Spain

    E. Saquete, R. Muñoz, P. Martínez-Barco & J. L. Vicedo

Authors
  1. E. Saquete
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  2. R. Muñoz
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  3. P. Martínez-Barco
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  4. J. L. Vicedo
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Editor information

Editors and Affiliations

  1. Department of Software and Computing Systems, University of Alicante, Spain

    José Luis Vicedo

  2. Natural Language Processing and Information Systems Group, Department of Software and Computing Systems, University of Alicante, Spain

    Patricio Martínez-Barco

  3. Grupo de investigación del Procesamiento del Lenguaje y Sistemas de Información, Departamento de Lenguajes y Sistemas Informáticos, Universidad de Alicante, Alicante, Spain

    Rafael Muńoz

  4. Departamento de Lenguajes y Sistemas Informáticos, Carretera de San Vicente del Raspeig, Universidad de Alicante, 03690 San Vicente del Raspeig, Alicante, Spain

    Maximiliano Saiz Noeda

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© 2004 Springer-Verlag Berlin Heidelberg

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Saquete, E., Muñoz, R., Martínez-Barco, P., Vicedo, J.L. (2004). Comparison and Evaluation of Two Approaches of a Multilayered QA System Applied to Temporality. In: Vicedo, J.L., Martínez-Barco, P., Muńoz, R., Saiz Noeda, M. (eds) Advances in Natural Language Processing. EsTAL 2004. Lecture Notes in Computer Science(), vol 3230. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30228-5_9

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  • DOI: https://doi.org/10.1007/978-3-540-30228-5_9

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-23498-2

  • Online ISBN: 978-3-540-30228-5

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