Stella confessed that a monkey ate a cockroach .
confess . agent ( x _ 1 , Stella ) AND confess . ccomp ( x _ 1 , x _ 5 ) AND monkey ( x _ 4 ) AND eat . agent ( x _ 5 , x _ 4 ) AND eat . theme ( x _ 5 , x _ 7 ) AND cockroach ( x _ 7 )