A horse gave the teacher a cake on a piano .
* teacher ( x _ 4 ) ; horse ( x _ 1 ) AND give . agent ( x _ 2 , x _ 1 ) AND give . recipient ( x _ 2 , x _ 4 ) AND give . theme ( x _ 2 , x _ 6 ) AND cake ( x _ 6 ) AND cake . nmod . on ( x _ 6 , x _ 9 ) AND piano ( x _ 9 )