Emma proved that the boy dreamed to walk .
* boy ( x _ 4 ) ; prove . agent ( x _ 1 , Emma ) AND prove . ccomp ( x _ 1 , x _ 5 ) AND dream . agent ( x _ 5 , x _ 4 ) AND dream . xcomp ( x _ 5 , x _ 7 ) AND walk . agent ( x _ 7 , x _ 4 )