Tense trees as the "fine structure" of discourse

Authors:
Chung Hee Hwang;Lenhart K. Schubert
Affiliations:
University of Rochester, Rochester, New York;University of Rochester, Rochester, New York
Venue:
ACL '92 Proceedings of the 30th annual meeting on Association for Computational Linguistics
Year:
1992

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Abstract

We present a new compositional tense-aspect deindexing mechanism that makes use of tense trees as components of discourse contexts. The mechanism allows reference episodes to be correctly identified even for embedded clauses and for discourse that involves shifts in temporal perspective, and permits deindexed logical forms to be automatically computed with a small number of deindexing rules.