Breck Baldwin Michael Collins 0001 Jason Eisner Adwait Ratnaparkhi Joseph Rosenzweig Anoop Sarkar University of Pennsylvania: description of the University of Pennsylvania system used for MUC-6. 177-191 1995 MUC https://doi.org/10.3115/1072399.1072416 conf/muc/1995 db/conf/muc/muc1995.html#BaldwinCERRS95