Ava sold the boy the cake on a computer .
* boy ( x _ 3 ) ; * cake ( x _ 5 ) ; sell . agent ( x _ 1 , Ava ) AND sell . recipient ( x _ 1 , x _ 3 ) AND sell . theme ( x _ 1 , x _ 5 ) AND cake . nmod . on ( x _ 5 , x _ 8 ) AND computer ( x _ 8 )