A real world implementation of answer extraction

Diego Molla-Aliod, Jawad Berri, Michael Hess

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


We describe ExtrAns, an answer extraction system. Answer extraction (AE) aims at retrieving those exact passages of a document that directly answer a given user question. AE is more ambitious than information retrieval and information extraction in that the retrieval results are phrases, not entire documents, and in that the queries may be arbitrarily specific. It is less ambitious than full-fledged question answering in that the answers are not generated from a knowledge base but looked up in the text of documents. The current version of ExtrAns is able to parse unedited Unix "man pages", and derive the logical form of their sentences. User queries are also translated into logical forms. A theorem prover then retrieves the relevant phrases, which are presented through selective highlighting in their context.
Original languageEnglish
Title of host publicationDEXA 1998
Subtitle of host publicationProceedings of the Ninth International Workshop on Database and Expert Systems Applications
EditorsA Min Tjoa, Roland R. Wagner
Place of PublicationPiscataway, NJ
PublisherIEEE:Institute of Electrical Electronics Engineers Inc
Number of pages6
ISBN (Print)0818683538
Publication statusPublished - 1998
Externally publishedYes
EventNinth International Workshop on Database and Expert Systems Applications - Vienna, Austria
Duration: 26 Aug 199828 Aug 1998


ConferenceNinth International Workshop on Database and Expert Systems Applications


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