A robust shallow temporal reasoning system

Authors:
Ran Zhao;Quang Xuan Do;Dan Roth
Affiliations:
University of Illinois at Urbana-Champaign, Urbana, IL;University of Illinois at Urbana-Champaign, Urbana, IL;University of Illinois at Urbana-Champaign, Urbana, IL
Venue:
NAACL HLT '12 Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies: Demonstration Session
Year:
2012

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Abstract

This paper presents a demonstration of a temporal reasoning system that addresses three fundamental tasks related to temporal expressions in text: extraction, normalization to time intervals and comparison. Our system makes use of an existing state-of-the-art temporal extraction system, on top of which we add several important novel contributions. In addition, we demonstrate that our system can perform temporal reasoning by comparing normalized temporal expressions with respect to several temporal relations. Experimental study shows that the system achieves excellent performance on all the tasks we address.