期刊名称：Conference on European Chapter of the Association for Computational Linguistics (EACL)
出版年度：2012
卷号：2012
出版社：ACL Anthology
摘要：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
(51.1% vs. 39.6%) and is more robust. In particular,
unlike past methods, ours does not require
ad-hoc rules over non-local features, and
so can be easily integrated into a parser.
