期刊名称：Conference on European Chapter of the Association for Computational Linguistics (EACL)
出版年度：2010
卷号：2010
出版社：ACL Anthology
摘要：The definition of combinatory categorial
grammar (CCG) in the literature varies
quite a bit from author to author. However,
the differences between the definitions
are important in terms of the language
classes of each CCG. We prove
that a wide range of CCGs are strongly
context-free, including the CCG of CCGbank
and of the parser of Clark and Curran
(2007). In light of these new results,
we train the PCFG parser of Petrov and
Klein (2007) on CCGbank and achieve
state of the art results in supertagging accuracy,
PARSEVAL measures and dependency
accuracy.
