NYU: Description of the Proteus/PET System as Used for MUC-7 ST Roman Yangarber author Ralph Grishman author 1998 text Seventh Message Understanding Conference (MUC-7): Proceedings of a Conference Held in Fairfax, Virginia, April 29 - May 1, 1998 conference publication yangarber-grishman-1998-nyu https://aclanthology.org/M98-1011/ 1998