A baby discovered the cake on the stage on a shelf .
* cake ( x _ 4 ) ; * stage ( x _ 7 ) ; baby ( x _ 1 ) AND discover . agent ( x _ 2 , x _ 1 ) AND discover . theme ( x _ 2 , x _ 4 ) AND cake . nmod . on ( x _ 4 , x _ 7 ) AND stage . nmod . on ( x _ 7 , x _ 10 ) AND shelf ( x _ 10 )