Construction of Membership Functions for Fuzzy Time Periods
Steven Schockaert · 2005
Abstract. Temporal question answering requires the determination of the time span of (historic) events. Because the boundaries of historic time periods are often vague, the formalism used for the representation of time periods should be tolerant for imprecision and uncertainty. In this paper we suggest an approach based on fuzzy sets and provide a fully automatic mechanism, which uses statements on the web about the beginning and ending of a particular event, to construct the membership functions. 1