Portability in the Janus Natural Language Interface Ralph M Weischedel author Robert J Bobrow author Damaris Ayuso author Lance Ramshaw author 1989 text Speech and Natural Language: Proceedings of a Workshop Held at Philadelphia, Pennsylvania, February 21-23, 1989 conference publication weischedel-etal-1989-portability https://aclanthology.org/H89-1013/ 1989