Paper: Morpho-syntactic Lexical Generalization for CCG Semantic Parsing

ACL ID D14-1135
Title Morpho-syntactic Lexical Generalization for CCG Semantic Parsing
Venue Conference on Empirical Methods in Natural Language Processing
Session Main Conference
Year 2014
Authors

In this paper, we demonstrate that significant performance gains can be achieved in CCG semantic parsing by introducing a linguistically moti- vated grammar induction scheme. We present a new morpho-syntactic fac- tored lexicon that models systematic variations in morphology, syntax, and semantics across word classes. The grammar uses domain-independent facts about the English language to restrict the number of incorrect parses that must be considered, thereby enabling effective learning from less data. Experiments in benchmark domains match previous models with one quarter of the data and provide new state-of-the-art results with all available data, including up to 45% relative test-error reduction.