Paper: Discriminative Strategies to Integrate Multiword Expression Recognition and Parsing

ACL ID P12-1022
Title Discriminative Strategies to Integrate Multiword Expression Recognition and Parsing
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2012
Authors

The integration of multiword expressions in a parsing procedure has been shown to improve accuracy in an artificial context where such expressions have been perfectly pre-identified. This paper evaluates two empirical strategies to integrate multiword units in a real con- stituency parsing context and shows that the results are not as promising as has sometimes been suggested. Firstly, we show that pre- grouping multiword expressions before pars- ing with a state-of-the-art recognizer improves multiword recognition accuracy and unlabeled attachment score. However, it has no statis- tically significant impact in terms of F-score as incorrect multiword expression recognition has important side effects on parsing. Sec- ondly, integrating multiword expressions in the parser grammar followed by...