New York University Description of the PROTEUS System as Used for MUC-4 Ralph Grishman author Catherine Macleod author John Sterling author 1992 text Fourth Message Understanding Conference (MUC-4): Proceedings of a Conference Held in McLean, Virginia, June 16-18, 1992 conference publication grishman-etal-1992-new-york https://aclanthology.org/M92-1032/ 1992