Hostname: page-component-848d4c4894-4rdrl Total loading time: 0 Render date: 2024-06-22T19:24:21.420Z Has data issue: false hasContentIssue false

Open-domain textual question answering techniques

Published online by Cambridge University Press:  14 August 2003

SANDA M. HARABAGIU
Affiliation:
Department of Computer Science, University of Texas at Dallas, Richardson, TX 75083, USA (e-mail: sanda@cs.utdallas.edu)
STEVEN J. MAIORANO
Affiliation:
Department of Computer Science, University of Sheffield, Sheffield S1 4DP, UK
MARIUS A. PAŞCA
Affiliation:
Language Computer Corporation, Dallas, TX 75206, USA (e-mail: marius@languagecomputer.com)

Abstract

Textual question answering is a technique of extracting a sentence or text snippet from a document or document collection that responds directly to a query. Open-domain textual question answering presupposes that questions are natural and unrestricted with respect to topic. The question answering (Q/A) techniques, as embodied in today's systems, can be roughly divided into two types: (1) techniques for Information Seeking (IS), which localize the answer in vast document collections; and (2) techniques for Reading Comprehension (RC) that answer a series of questions related to a given document. Although these two types of techniques and systems are different, it is desirable to combine them for enabling more advanced forms of Q/A. This paper discusses an approach that successfully enhanced an existing IS system with RC capabilities. This enhancement is important because advanced Q/A, as exemplified by the ARDA AQUAINT program, is moving towards Q/A systems that incorporate semantic and pragmatic knowledge enabling dialogue-based Q/A. Because today's RC systems involve a short series of questions in context, they represent a rudimentary form of interactive Q/A which constitutes a possible foundation for more advanced forms of dialogue-based Q/A.

Type
Papers
Copyright
2003 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)