Identifying contradictory and contrastive relations between statements to outline web information on a given topic

Authors:
Daisuke Kawahara;Kentaro Inui;Sadao Kurohashi
Affiliations:
National Institute of Information and Communications Technology;National Institute of Information and Communications Technology and Tohoku University;National Institute of Information and Communications Technology and Kyoto University
Venue:
COLING '10 Proceedings of the 23rd International Conference on Computational Linguistics: Posters
Year:
2010

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Abstract

We present a method for producing a bird's-eye view of statements that are expressed on Web pages on a given topic. This method aggregates statements that are relevant to the topic, and shows contradictory and contrastive relations among them. This view of contradictions and contrasts helps users acquire a top-down understanding of the topic. To realize this, we extract such statements and relations, including cross-document implicit contrastive relations between statements, in an unsupervised manner. Our experimental results indicate the effectiveness of our approach.