A black dog bounds across the sand.
The dog is running in the sand.
The dog, which is a black dog, bounds across the sand which is running across the sand.
exists e1 s1 x1 x2.(n_sand(x2) & across(e1,x2) & Actor(e1,x1) & v_bound(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_sand(x2) & n_dog(x1) & in(e1,x2) & Actor(e1,x1) & v_run(e1))