A knowledge-based textual entailment approach applied to the QA answer validation at CLEF 2006

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Title: A knowledge-based textual entailment approach applied to the QA answer validation at CLEF 2006
Authors: Ferrández Escámez, Óscar | Muñoz Terol, Rafael | Muñoz, Rafael | Martínez-Barco, Patricio | Palomar, Manuel
Research Group/s: Procesamiento del Lenguaje y Sistemas de Información (GPLSI)
Center, Department or Service: Universidad de Alicante. Departamento de Lenguajes y Sistemas Informáticos
Keywords: Question answering | Answer validation | Textual entailment | WordNet | Semantic relations
Knowledge Area: Lenguajes y Sistemas Informáticos
Issue Date: 2006
Publisher: CLEF
Citation: FERRÁNDEZ, Ó, et al. "A knowledge-based textual entailment approach applied to the QA answer validation at CLEF 2006". En: Working notes for the CLEF 2006 workshop [Recurso electrónico] : 20-22 September, Alicante, Spain
Abstract: The Answer Validation Exercise (AVE) is a pilot track within the Cross-Language Evaluation Forum (CLEF) 2006. The AVE competition provides an evaluation frame- work for answer validations in Question Answering (QA). In our participation in AVE, we propose a system that has been initially used for other task as Recognising Textual Entailment (RTE). The aim of our participation is to evaluate the improvement our system brings to QA. Moreover, due to the fact that these two task (AVE and RTE) have the same main idea, which is to find semantic implications between two fragments of text, our system has been able to be directly applied to the AVE competition. Our system is based on the representation of the texts by means of logic forms and the computation of semantic comparison between them. This comparison is carried out using two different approaches. The first one managed by a deeper study of the Word- Net relations, and the second uses the measure defined by Lin in order to compute the semantic similarity between the logic form predicates. Moreover, we have also designed a voting strategy between our system and the MLEnt system, also presented by the University of Alicante, with the aim of obtaining a joint execution of the two systems developed at the University of Alicante. Although the results obtained have not been very high, we consider that they are quite promising and this supports the fact that there is still a lot of work on researching in any kind of textual entailment.
Sponsor: This research has been partially funded by the Spanish Government under project CICyT number TIC2003-07158-C04-01.
URI: http://hdl.handle.net/10045/22645
ISBN: 2-912335-23-X
Language: eng
Type: info:eu-repo/semantics/conferenceObject
Peer Review: si
Appears in Collections:INV - GPLSI - Comunicaciones a Congresos, Conferencias, etc.

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