A dog leaps across the grass.
The dog is in deep space.
Grass and space are different.
exists e1 x1 x2.(n_grass(x2) & across(e1,x2) & Actor(e1,x1) & v_leap(e1) & n_dog(x1))
exists p1 x1.(n_dog(x1) & exists s1 x2.(in(x1,x2) & n_space(x2) & a_deep(s1) & Theme(s1,x2)))