Unisys: Description of the Unisys System Used for MUC-3 Carl Weir author Tim Finin author Robin McEntire author Barry Silk author 1991 text Third Message Understanding Conference (MUC-3): Proceedings of a Conference Held in San Diego, California, May 21-23, 1991 conference publication weir-etal-1991-unisys-description https://aclanthology.org/M91-1032/ 1991