Probabilistic Coordination Disambiguation in a Fully-Lexicalized Japanese Parser

要旨

This paper describes a probabilistic model for coordination disambiguation integrated into syntactic and case structure analy-sis. Our model probabilistically assesses the parallelism of a candidate coordinate structure using syntactic/semantic similari-ties and cooccurrence statistics. We inte-grate these probabilities into the framework of fully-lexicalized parsing based on large-scale case frames. This approach simulta-neously addresses two tasks of coordination disambiguation: the detection of coordinate conjunctions and the scope disambiguation of coordinate structures. Experimental re-sults on web sentences indicate the effective-ness of our approach. 1

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