BBN PLUM: MUC-3 Test Results and Analysis Ralph Weischedel author Damaris Ayuso author Sean Boisen author Robert Ingria author Jeff Palmucci author 1991 text Third Message Understanding Conference (MUC-3): Proceedings of a Conference Held in San Diego, California, May 21-23, 1991 conference publication weischedel-etal-1991-bbn https://aclanthology.org/M91-1006/ 1991