Web-Scale Features for Full-Scale Parsing

Counts from large corpora (like the web) can be powerful syntactic cues. Past work has used web counts to help resolve isolated ambiguities, such as binary noun-verb PP attachments and noun compound bracketings. In this work, we first present a method for generating web count features that address the full range of syntactic attachments. These features encode both surface evidence of lexical affinities as well as paraphrase-based cues to syntactic structure. We then integrate our features into full-scale dependency and constituent parsers. We show relative error reductions of 7.0% over the second-order dependency parser of McDonald and Pereira (2006), 9.2% over the constituent parser of Petrov et al. (2006), and 3.4% over a non-local constituent reranker.

• Type: Journal
• Year: 2011
• Where: ACL
• Authors: Mohit Bansal, Dan Klein
• Keywords: ACL 2011, Computational Linguistics, Dependency Parser, Noun Compound, Syntactic Cues