A dog in the grass in front of a building.
A dog is relieving itself on the lawn.
Just because a dog is in the grass does not imply that it is relieving itself.
exists x1 x2 x3 x4.(n_grass(x2) & a_topic(x1) & in(x1,x2) & in(x2,x3) & of(x3,x4) & n_building(x4) & n_front(x3) & n_dog(x1))
exists e1 x1 x2 x3.(n_lawn(x3) & n_thing(x2) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_relieve(e1) & n_dog(x1))