Abstract
This paper proposes a method of extracting metonymic expressions and their interpretativeexpressions from corpora and its application to the full-parsing-basedmatching method of a QA system Dialog Navigator.Namely, our method resolvesmodifier-head relation gaps between user questions and texts, by registering pairs ofmetonymic expressions (e.g. “display a GIF”) and interpretative expressions (e.g. “display a GIF file”) into the synonymous expression dictionary of Dialog Navigator.An evaluation showed that most of the extracted interpretations were correct, andan experiment using testsets indicated that introducing the metonymic expressionssignificantly improved the performance of our system.
