Publication - Overview of the CLEF 2008 Multilingual Question Answering Track
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Overview of the CLEF 2008 Multilingual Question Answering Track

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Year: 2009
Authors: Pamela Forner; Anselmo Penas; Inaki Alegria; Corina Forascu; Nicolas Moreau; Petya Osenova; Prokopis Prokopidis; Paulo Rocha; Bodgan Sacaleanu; Richard Sutcliffe; Erik Tjong Kim Sang
Publisher: Springer-Verlag
Editor: Carol Peters and Thomas Deselaers and Nicola Ferro and Julio Gonzalo and Gareth J. F. Jones and Mikko Kurimo and Thomas Mandl and Anselmo Pe?as and Vivien Petras
Address: Berlin, Heidelberg
Pages: 262-295
ISBN: 3-642-04446-8, 978-3-642-04446-5
Abstract:
The QA campaign at CLEF 2008, was mainly the same as that proposed last year. The results and the analyses reported by last year’s participants suggested that the changes introduced in the previous campaign had led to a drop in systems’ performance. So for this year’s competition it has been decided to practically replicate last year’s exercise. Following last year’s experience some QA pairs were grouped in clusters. Every cluster was characterized by a topic (not given to participants). The questions from a cluster contained co-references between one of them and the others. Moreover, as last year, the systems were given the possibility to search for answers in Wikipedia as document corpus beside the usual newswire collection. In addition to the main task, three additional exercises were offered, namely the Answer Validation Exercise (AVE), the Question Answering on Speech Transcriptions (QAST), which continued last year’s successful pilots, together with the new Word Sense Disambiguation for Question Answering (QA-WSD). As general remark, it must be said that the main task still proved to be very challenging for participating systems. As a kind of shallow comparison with last year’s results the best overall accuracy dropped significantly from 42% to 19% in the multi-lingual subtasks, but increased a little in the monolingual sub-tasks, going from 54% to 63%.
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