A dog walks on rocks covered by snow
A cat is walking on snow-covered rocks.
dog and cat are different animals
exists e2 e1 x1 x2 x3 x4.(on(e1,x2) & Actor(e2,x4) & n_snow(x4) & Theme(e2,x3) & v_cover(e2) & (x2 = x3) & n_rock(x2) & Actor(e1,x1) & v_walk(e1) & n_dog(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_rock(x2) & a_snow-covered(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_cat(x1))