On June 28, 1997, in what would become known as the bite fight, Mike Tyson bit Evander Holyfield's ear, purportedly in retaliation for Holyfield headbutting him.
It was a clean fight with no blood loss.
Mike Tyson bit an ear which would result in blood loss.
( z1 fight :ARG1-of ( z2 clean ) :manner ( z3 lose :polarity - :ARG1 ( z4 blood ) ) )