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Simple Robust Grammar Induction with Combinatory Categorial Grammars

Yonatan Bisk, Julia Hockenmaier

2021Proceedings of the AAAI Conference on Artificial Intelligence38 citationsDOIOpen Access PDF

Abstract

We present a simple EM-based grammar induction algorithm for Combinatory Categorial Grammar (CCG) that achieves state-of-the-art performance by relying on a minimal number of very general linguistic principles. Unlike previous work on unsupervised parsing with CCGs, our approach has no prior language-specific knowledge, and discovers all categories automatically. Additionally, unlike other approaches, our grammar remains robust when parsing longer sentences, performing as well as or better than other systems. We believe this is a natural result of using an expressive grammar formalism with an extended domain of locality.

Topics & Concepts

Combinatory categorial grammarCategorial grammarMildly context-sensitive grammar formalismLink grammarComputer scienceParsingNatural language processingEmergent grammarGrammarTree-adjoining grammarArtificial intelligenceL-attributed grammarRule-based machine translationParsing expression grammarHead-driven phrase structure grammarFormalism (music)Affix grammarProgramming languageGenerative grammarSimple (philosophy)Attribute grammarLinguisticsContext-free grammarEpistemologyVisual artsArtPhilosophyMusicalNatural Language Processing TechniquesTopic ModelingSpeech and dialogue systems
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