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A second-order joint Eisner model for syntactic and semantic dependency parsing
Lluis Martorell, Xavier; Bott, Stefan Markus; Màrquez Villodre, Lluís
Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics
We present a system developed for theCoNLL-2009 Shared Task (Hajic et al., 2009).We extend the Carreras (2007) parser tojointly annotate syntactic and semantic dependencies.This state-of-the-art parser factorizesthe built tree in second-order factors. Weinclude semantic dependencies in the factorsand extend their score function to combinesyntactic and semantic scores. The parser iscoupled with an on-line averaged perceptron(Collins, 2002) as the learning method. Ouraveraged results for all seven languages are71.49 macro F1, 79.11 LAS and 63.06 semanticF1.
2012-05-10
Àrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica
Computational linguistics -- Research
Natural language processing (Computer science)
Llenguatge natural (Informàtica) -- Processament
Lingüística computacional
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