William helped the cake in the house on the platter .
* cake ( x _ 3 ) ; * house ( x _ 6 ) ; * platter ( x _ 9 ) ; help . agent ( x _ 1 , William ) AND help . theme ( x _ 1 , x _ 3 ) AND cake . nmod . in ( x _ 3 , x _ 6 ) AND house . nmod . on ( x _ 6 , x _ 9 )