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2000

Specifying the Parameters of Centering Theory: a Corpus-Based Evaluation using Text from Application-Oriented Domains

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Specifying the Parameters of Centering Theory: a Corpus-Based Evaluation using Text from Application-Oriented Domains
The definitions of the basic concepts, rules, and constraints of centering theory involve underspecified notions such as `previous utterance', `realization', and `ranking'. We attempted to find the best way of defining each such notion among those that can be annotated reliably, and using a corpus of texts in two domains of practical interest. Our main result is that trying to reduce the number of utterances without a backwardlooking center (CB) results in an increased number of cases in which some discourse entity, but not the CB, gets pronominalized, and viceversa. 1 MOTIVATION Centering Theory (Grosz et al., 1995; Walker et al., 1998b) is best characterized as a `parametric' theory: its key definitions and claims involve notions such as `utterance', `realization', and `ranking' which are not completely specified; their precise definition is left as a matter for empirical research, and may vary from language to language. A first goal of the work pr...
Massimo Poesio, Hua Cheng, Renate Henschel, Janet
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 2000
Where ACL
Authors Massimo Poesio, Hua Cheng, Renate Henschel, Janet Hitzeman, Rodger Kibble, Rosemary Stevenson
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