Polynomial Learnability and Locality of Formal Grammars Naoki Abe author 1988-06 text 26th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Buffalo, New York, USA conference publication abe-1988-polynomial 10.3115/982023.982051 https://aclanthology.org/P88-1028/ 1988-06 225 232