A monster offered the cake on the stage to Ethan .
* cake ( x _ 4 ) ; * stage ( x _ 7 ) ; monster ( x _ 1 ) AND offer . agent ( x _ 2 , x _ 1 ) AND offer . theme ( x _ 2 , x _ 4 ) AND offer . recipient ( x _ 2 , Ethan ) AND cake . nmod . on ( x _ 4 , x _ 7 )