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Wauter Bosma: 'Contextual salience in query-based summarization' (2010/10/22)

Speaker: Wauter Bosma (Vrieje Universiteit Amsterdam)
Date: Oct 22, 2010
Time: 15:00
Where: Computer Science Faculty, room 2.2 .

Wauter Bosma is currently working as a postdoc on the European KYOTO project (where Ixa group is another partner) at the Vrieje Universiteit Amsterdam . His main research interests are in the area of Natural Language Processing, and in particular text mining, terminology extraction and automatic summarization. In 2008 he received his PhD from the University of Twente on ‘Discourse-oriented summarization’.

Discourse theories claim that text gets meaning in context. Most summarization systems do not take advantage of this. They assess the relevance of each passage individually rather than modeling the way context affects the relevance of passages. In order to model relations in text, I developed a framework for graph-based summarization, so that the passages can be viewed in a broader context. The result is a summarization system which is more in line with discourse theory but still fully automatic. I evaluated the content selection performance of an implementation of the framework in different configurations. The system significantly outperforms a competitive baseline (and participant systems) on the DUC 2005 evaluation set.

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