UMass/Hughes: Description of the CIRCUS System Used for TIPSTER Text W Lehnert author J McCarthy author S Soderland author E Riloff author C Cardie author J Peterson author F Feng author 1993-09 text TIPSTER TEXT PROGRAM: PHASE I: Proceedings of a Workshop held at Fredricksburg, Virginia, September 19-23, 1993 Association for Computational Linguistics Fredericksburg, Virginia, USA conference publication lehnert-etal-1993-umass-hughes 10.3115/1119149.1119174 https://aclanthology.org/X93-1022/ 1993-09 241 256