Paper: Fully Lexicalising CCGbank with Hat Categories

ACL ID D09-1126
Title Fully Lexicalising CCGbank with Hat Categories
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2009
Authors

We introduce an extension to CCG that al- lows form and function to be represented simultaneously, reducing the proliferation of modifier categories seen in standard CCG analyses. We can then remove the non-combinatory rules CCGbank uses to address this prob- lem, producingagrammarthatisfullylex- icalised and far less ambiguous. There are intrinsic benefits to full lexi- calisation, such as semantic transparency and simpler domain adaptation. The clear- est advantage is a 52-88% improvement in parse speeds, which comes with only a small reduction in accuracy.