Parser Evaluation over Local and Non-Local Deep Dependencies in a Large Corpus

Emily M. Bender, Dan Flickinger, Stephan Oepen, Yi Zhang

Abstract: In order to obtain a fine-grained evaluation of parser accuracy over naturally occurring text, we study 100 examples each of ten reasonably frequent linguistic phenomena, randomly selected from a parsed version of the English Wikipedia. We construct a corresponding set of gold-standard target dependencies for these 1000 sentences, operationalize mappings to these targets from seven state-of-the-art parsers, and evaluate the parsers against this data to measure their level of success in identifying these dependencies.