Abigail proved that a dog discovered the girl .
* girl ( x _ 7 ) ; prove . agent ( x _ 1 , Abigail ) AND prove . ccomp ( x _ 1 , x _ 5 ) AND dog ( x _ 4 ) AND discover . agent ( x _ 5 , x _ 4 ) AND discover . theme ( x _ 5 , x _ 7 )