A writer fed a cat the sandwich on the sofa .
* sandwich ( x _ 6 ) ; * sofa ( x _ 9 ) ; writer ( x _ 1 ) AND feed . agent ( x _ 2 , x _ 1 ) AND feed . recipient ( x _ 2 , x _ 4 ) AND feed . theme ( x _ 2 , x _ 6 ) AND cat ( x _ 4 ) AND sandwich . nmod . on ( x _ 6 , x _ 9 )