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Identifying Sources of Weakness in Syntactic Lexicon Extraction

Claire Gardent 1 Alejandra Lorenzo 1 
1 TALARIS - Natural Language Processing: representation, inference and semantics
Inria Nancy - Grand Est, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : Previous work has shown that large scale subcategorisation lexicons could be extracted from parsed corpora with reasonably high precision. In this paper, we apply a standard extraction procedure to a 100 millions words parsed corpus of french and obtain rather poor results. We investigate different factors likely to improve performance such as in particular, the specific extraction procedure and the parser used; the size of the input corpus; and the type of frames learned. We try out different ways of interleaving the output of several parsers with the lexicon extraction process and show that none of them improves the results. Conversely, we show that increasing the size of the input corpus and modifying the extraction procedure to better differentiate prepositional arguments from prepositional modifiers improves performance. In conclusion, we suggest that a more sophisticated approach to parser combination and better probabilistic models of the various types of prepositional objects in French are likely ways to get better results.
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Contributor : Claire Gardent Connect in order to contact the contributor
Submitted on : Wednesday, November 17, 2010 - 6:00:24 PM
Last modification on : Friday, February 4, 2022 - 3:22:01 AM


  • HAL Id : inria-00537150, version 1



Claire Gardent, Alejandra Lorenzo. Identifying Sources of Weakness in Syntactic Lexicon Extraction. The seventh international conference on Language Resources and Evaluation - LREC'10, May 2010, Malta, Malta. ⟨inria-00537150⟩



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