Title Identifying Definitions in Text Collections for Question Answering
Author(s) Horacio Saggion

Department of Computer Science, University of Sheffield, UK

Session P23-W
Abstract One particular type of question which was made the focus of its own subtask within the TREC2003 QA track was the definition question (``What is X?'' or ``Who is X?''). One of the main problems with this type of question is how to discriminate in vast text collections between definitional and non-definitional text passages about a particular definiendum (i.e., the term to be defined). A method will be presented that uses definition patterns and terms that co-occurr with the definiendum in on-line sources for both passage selection and definition extraction.
Keyword(s) Information Extraction, Question Answering, Definition, Patterns, Definition Knowledge
Language(s) English
Full Paper 331.pdf