Question answering from structured knowledge sources

Article


Frank, A., Krieger, H., Xu, F., Uszkoreit, H., Crysmann, B., Joerg, B. and Schäfer, U. 2007. Question answering from structured knowledge sources. Journal of Applied Logic. 5 (1), pp. 20-48. https://doi.org/10.1016/j.jal.2005.12.006
TypeArticle
TitleQuestion answering from structured knowledge sources
AuthorsFrank, A., Krieger, H., Xu, F., Uszkoreit, H., Crysmann, B., Joerg, B. and Schäfer, U.
Abstract

We present an implemented approach for domain-restricted question answering from structured knowledge sources, based on robust semantic analysis in a hybrid NLP system architecture. We perform question interpretation and answer extraction in an architecture that builds on a lexical-conceptual structure for question interpretation, which is interfaced with domain-specific concepts and properties in a structured knowledge base. Question interpretation involves a limited amount of domain-specific inferences, and accounts for higher-level quantificational questions. Question interpretation and answer extraction are modular components that interact in clearly defined ways. We derive so-called proto queries from the linguistic representations, which provide partial constraints for answer extraction from the underlying knowledge sources. The search queries we construct from proto queries effectively compute minimal spanning trees from the underlying knowledge sources. Our approach naturally extends to multilingual question answering, and has been developed as a prototype system for two application domains: the domain of Nobel prize winners, and the domain of Language Technology, on the basis of the large ontology underlying the information portal LT World.

KeywordsQA, Hybrid NLP, Multilinguality, RMRS, Question semantics, Ontology modeling, Data base queries
PublisherElsevier
JournalJournal of Applied Logic
ISSN1570-8683
Publication dates
Online27 Jan 2007
Print31 Mar 2007
Publication process dates
Deposited27 Sep 2020
Output statusPublished
Digital Object Identifier (DOI)https://doi.org/10.1016/j.jal.2005.12.006
LanguageEnglish
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