Overview of the clef 2008 multilingual question answering track

Pamela Forner, Anselmo Peñas, Eneko Agirre, Iñaki Alegria, Corina Forǎscu, Nicolas Moreau, Petya Osenova, Prokopis Prokopidis, Paulo Rocha, Bogdan Sacaleanu, Richard Sutcliffe, Erik Tjong Kim Sang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The QA campaign at CLEF 2008 [1], 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%.

Original languageEnglish
Title of host publicationEvaluating Systems for Multilingual and Multimodal Information Access - 9th Workshop of the Cross-Language Evaluation Forum, CLEF 2008, Revised Selected Papers
Pages262-295
Number of pages34
DOIs
Publication statusPublished - 2009
Event9th Workshop of the Cross-Language Evaluation Forum, CLEF 2008 - Aarhus, Denmark
Duration: 17 Sep 200819 Sep 2008

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5706 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference9th Workshop of the Cross-Language Evaluation Forum, CLEF 2008
Country/TerritoryDenmark
CityAarhus
Period17/09/0819/09/08

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