Answering List Questions using Co-occurrence and Clustering

Majid Razmara, Leila Kosseim


Abstract
Although answering list questions is not a new research area, answering them automatically still remains a challenge. The median F-score of systems that participated in TREC 2007 Question Answering track is still very low (0.085) while 74% of the questions had a median F-score of 0. In this paper, we propose a novel approach to answering list questions. This approach is based on the hypothesis that answer instances of a list question co-occur in the documents and sentences related to the topic of the question. We use a clustering method to group the candidate answers that co-occur more often. To pinpoint the right cluster, we use the target and the question keywords as spies to return the cluster that contains these keywords.
Anthology ID:
L08-1138
Volume:
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)
Month:
May
Year:
2008
Address:
Marrakech, Morocco
Venue:
LREC
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Publisher:
European Language Resources Association (ELRA)
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Pages:
Language:
URL:
http://www.lrec-conf.org/proceedings/lrec2008/pdf/814_paper.pdf
DOI:
Bibkey:
Cite (ACL):
Majid Razmara and Leila Kosseim. 2008. Answering List Questions using Co-occurrence and Clustering. In Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08), Marrakech, Morocco. European Language Resources Association (ELRA).
Cite (Informal):
Answering List Questions using Co-occurrence and Clustering (Razmara & Kosseim, LREC 2008)
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PDF:
http://www.lrec-conf.org/proceedings/lrec2008/pdf/814_paper.pdf