A prisoner brought Ava a cake on the bed .
* bed ( x _ 8 ) ; prisoner ( x _ 1 ) AND bring . agent ( x _ 2 , x _ 1 ) AND bring . recipient ( x _ 2 , Ava ) AND bring . theme ( x _ 2 , x _ 5 ) AND cake ( x _ 5 ) AND cake . nmod . on ( x _ 5 , x _ 8 )