Emma served the frog the box on the tree .
* frog ( x _ 3 ) ; * box ( x _ 5 ) ; * tree ( x _ 8 ) ; serve . agent ( x _ 1 , Emma ) AND serve . recipient ( x _ 1 , x _ 3 ) AND serve . theme ( x _ 1 , x _ 5 ) AND box . nmod . on ( x _ 5 , x _ 8 )