Unlexicalised Hidden Variable Models of Split Dependency Grammars

This paper investigates transforms of split dependency grammars into unlexicalised context-free grammars annotated with hidden symbols. Our best unlexicalised grammar achieves an accuracy of 88% on the Penn Treebank data set, that represents a 50% reduction in error over previously published results on unlexicalised dependency parsing.

• Type: Conference
• Year: 2008
• Where: ACL
• Authors: Gabriele Antonio Musillo, Paola Merlo
• Keywords: ACL 2008, Computational Linguistics, Paper Investigates Transforms, Split Dependency Grammars, Unlexicalised Context-free Grammars