A girl proved that Emma enjoyed to walk .
girl ( x _ 1 ) AND prove . agent ( x _ 2 , x _ 1 ) AND prove . ccomp ( x _ 2 , x _ 5 ) AND enjoy . agent ( x _ 5 , Emma ) AND enjoy . xcomp ( x _ 5 , x _ 7 ) AND walk . agent ( x _ 7 , Emma )