BBN: Description of the PLUM System as Used for MUC-4 Damaris Ayuso author Sean Boisen author Heidi Fox author Herb Gish author Robert Ingria author Ralph Weischedel author 1992 text Fourth Message Understanding Conference (MUC-4): Proceedings of a Conference Held in McLean, Virginia, June 16-18, 1992 conference publication ayuso-etal-1992-bbn https://aclanthology.org/M92-1024/ 1992