A frog was given a pizza on a stack in a room .
frog ( x _ 1 ) AND give . recipient ( x _ 3 , x _ 1 ) AND give . theme ( x _ 3 , x _ 5 ) AND pizza ( x _ 5 ) AND pizza . nmod . on ( x _ 5 , x _ 8 ) AND stack ( x _ 8 ) AND stack . nmod . in ( x _ 8 , x _ 11 ) AND room ( x _ 11 )