Robust Conversion of CCG Derivations to Phrase Structure Trees

We propose an improved, bottom-up method for converting CCG derivations into PTB-style phrase structure trees. In contrast with past work (Clark and Curran, 2009), which used simple transductions on category pairs, our approach uses richer transductions attached to single categories. Our conversion preserves more sentences under round-trip conversion

• Type: Journal
• Year: 2012
• Where: ACL
• Authors: Jonathan K. Kummerfeld, Dan Klein, James R. Curran
• Keywords: ACL 2012, Computational Linguistics, Curran, Derivations, Phrase Structure Trees