Valence Induction with a Head-Lexicalized PCFG

Details Valence Induction with a Head-Lexicalized PCFG Valence Induction with a Head-Lexicalized PCFG

1998-05-05

arxiv.org/abs/cmp-lg/9805001v1

Computer Science

Computation and Language

10 pages, 5 postscript figures

Scientific paper

This paper presents an experiment in learning valences (subcategorization frames) from a 50 million word text corpus, based on a lexicalized probabilistic context free grammar. Distributions are estimated using a modified EM algorithm. We evaluate the acquired lexicon both by comparison with a dictionary and by entropy measures. Results show that our model produces highly accurate frame distributions.

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