George R. Doddington Alexis Mitchell Mark A. Przybocki Lance A. Ramshaw Stephanie M. Strassel Ralph M. Weischedel The Automatic Content Extraction (ACE) Program - Tasks, Data, and Evaluation. 2004 LREC http://www.lrec-conf.org/proceedings/lrec2004/summaries/5.htm conf/lrec/2004 db/conf/lrec/lrec2004.html#DoddingtonMPRSW04