Supplementing Entity Coherence with Local Rhetorical Relations for Information Ordering

Authors:
Nikiforos Karamanis
Affiliations:
Natural Language and Information Processing Group, Computer Laboratory, University of Cambridge, Cambridge, UK
Venue:
Journal of Logic, Language and Information
Year:
2007

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Abstract

This paper investigates whether the model of local rhetorical coherence suggested in Knott et al. (2001) can boost the performance of the Centering-based metrics of entity coherence employed by Karamanis et al. (2004) for the task of information ordering. Rhetorical coherence is integrated into the way Centering's basic data structures are derived from the annotated features of the GNOME corpus. The results indicate that (a) the simplest metric continues to perform better than its competitors even when local rhetorical coherence is taken into account, and (b) this extra coherence constraint decreases its performance.