The boy gave the girl a crystal on a boat .
* boy ( x _ 1 ) ; * girl ( x _ 4 ) ; give . agent ( x _ 2 , x _ 1 ) AND give . recipient ( x _ 2 , x _ 4 ) AND give . theme ( x _ 2 , x _ 6 ) AND crystal ( x _ 6 ) AND crystal . nmod . on ( x _ 6 , x _ 9 ) AND boat ( x _ 9 )