Advanced structural representations for question classification and answer re-ranking

Silvia Quarteroni, Alessandro Moschitti, Suresh Manandhar, Roberto Basili

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Pages234-245
Number of pages12
Volume4425 LNCS
Publication statusPublished - 20 Dec 2007
Externally publishedYes
Event29th European Conference on IR Research, ECIR 2007 - Rome, Italy
Duration: 2 Apr 20075 Apr 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4425 LNCS
ISSN (Print)03029743
ISSN (Electronic)16113349

Other

Other29th European Conference on IR Research, ECIR 2007
CountryItaly
CityRome
Period2/4/075/4/07

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ASJC Scopus subject areas

  • Computer Science(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Theoretical Computer Science

Cite this

Quarteroni, S., Moschitti, A., Manandhar, S., & Basili, R. (2007). Advanced structural representations for question classification and answer re-ranking. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 4425 LNCS, pp. 234-245). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 4425 LNCS).