The frog was served the donut on a surface by a creature .
* frog ( x _ 1 ) ; * donut ( x _ 5 ) ; serve . recipient ( x _ 3 , x _ 1 ) AND serve . theme ( x _ 3 , x _ 5 ) AND serve . agent ( x _ 3 , x _ 11 ) AND donut . nmod . on ( x _ 5 , x _ 8 ) AND surface ( x _ 8 ) AND creature ( x _ 11 )