Michael confessed that Liam sold a creature a cockroach .
confess . agent ( x _ 1 , Michael ) AND confess . ccomp ( x _ 1 , x _ 4 ) AND sell . agent ( x _ 4 , Liam ) AND sell . recipient ( x _ 4 , x _ 6 ) AND sell . theme ( x _ 4 , x _ 8 ) AND creature ( x _ 6 ) AND cockroach ( x _ 8 )