Towards History-based Grammars: Using Richer Models for Probabilistic Parsing Ezra Black author Fred Jelinek author John Lafferty author David M Magerman author Robert Mercer author Salim Roukos author 1992 text Speech and Natural Language: Proceedings of a Workshop Held at Harriman, New York, February 23-26, 1992 conference publication black-etal-1992-towards https://aclanthology.org/H92-1026/ 1992