PRC Inc.: Description of the PAKTUS System Used for MUC-5 Bruce Loatman author Chih-King Yang author 1993 text Fifth Message Understanding Conference (MUC-5): Proceedings of a Conference Held in Baltimore, Maryland, August 25-27, 1993 conference publication loatman-yang-1993-prc https://aclanthology.org/M93-1017/ 1993