A large dog rubs its face in the grass.
A small dog is sleeping on the sidewalk.
The dog cannot be both large and small.
exists e1 s1 x1 x2 x3.(n_grass(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_rub(e1) & n_face(x2) & of(x2,x1) & n_thing(x1) & n_dog(x1) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_sidewalk(x2) & on(e1,x2) & Actor(e1,x1) & v_sleep(e1) & n_dog(x1) & a_small(s1) & Theme(s1,x1))