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Advanced Structural Representations for Question Classification and Answer Re-ranking
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BibTeX
@MISC{Quarteroni_advancedstructural,
author = {Silvia Quarteroni and Ro Moschitti and Suresh Man and Roberto Basili},
title = {Advanced Structural Representations for Question Classification and Answer Re-ranking},
year = {}
}
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Abstract
Abstract. In this paper, we study novel structures to represent information in three vital tasks in question answering: question classification, answer classification and answer reranking. We define a new tree structure called PAS to represent predicate-argument relations, as well as a new kernel function to exploit its representative power. Our experiments with Support Vector Machines and several tree kernel functions suggest that syntactic information helps specific task as question classification, whereas, when data sparseness is higher as in answer classification, studying coarse semantic information like PAS is a promising research area. 1
Keyphrases
question classification advanced structural representation answer re-ranking coarse semantic information support vector machine predicate-argument relation several tree kernel function novel structure new tree structure new kernel function answer reranking specific task answer classification promising research area representative power vital task question answering data sparseness syntactic information
