UNISYS: Description of the CBAS System Used for MUC-5 Carl Weir author Rich Fritzson author 1993 text Fifth Message Understanding Conference (MUC-5): Proceedings of a Conference Held in Baltimore, Maryland, August 25-27, 1993 conference publication weir-fritzson-1993-unisys https://aclanthology.org/M93-1021/ 1993