Paper: Fast and Accurate Arc Filtering for Dependency Parsing

ACL ID C10-1007
Title Fast and Accurate Arc Filtering for Dependency Parsing
Venue International Conference on Computational Linguistics
Session Main Conference
Year 2010
Authors

We propose a series of learned arc fil- ters to speed up graph-based dependency parsing. A cascade of filters identify im- plausible head-modifier pairs, with time complexity that is first linear, and then quadratic in the length of the sentence. The linear filters reliably predict, in con- text, words that are roots or leaves of de- pendency trees, and words that are likely to have heads on their left or right. We use this information to quickly prune arcs from the dependency graph. More than 78% of total arcs are pruned while retain- ing 99.5% of the true dependencies. These filters improve the speed of two state-of- the-art dependency parsers, with low over- head and negligible loss in accuracy.