New York University PROTEUS System: MUC-3 Test Results and Analysis Ralph Grishman author John Sterling author Catherine Macleod author 1991 text Third Message Understanding Conference (MUC-3): Proceedings of a Conference Held in San Diego, California, May 21-23, 1991 conference publication grishman-etal-1991-new https://aclanthology.org/M91-1013/ 1991