Discourse Comprehension based on Activity Propagation

概要

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One of the main task yet to be done in discourse comprehension is to figure out the information which we could not know by syntactic and semantic analysis. Among them are the referents of pronouns and the structure of discourse. These are found by anaphora resolution and discourse parsing respectively. However the basic intuition in this work is that anaphora resolution and discourse parsing are not separate businesses but mutually dependent tasks in processing. The process of constructing discourse structure and determining the discourse content are not able to be sequentially solved in general. To solve this situation, we introduce a different kind of factor that gives us another kind of clue to solve the problem, which we call activity propagation in this paper. Roughly speaking, we assume every referent has its activity. On the other hand, in sentences there are expressions that are willing to connect to already existing referent. We call this kind of expression "hungry referring expression". Using these notions we formalize the anaphora resolution as a link establishing process between referent in high activity and hungry referring expressions. Hopefully all these notions and ideas would be conflated into one whole structure to solve the problem by constraint satisfaction paradigm.
社団法人人工知能学会の論文
1992-11-01