A yellow dog in the snow.
The dog is looking for a ball in the snow.
A dog in the snow need not look for a ball only, it could even be looking for food.
exists s1 x1 x2.(n_snow(x2) & a_topic(x1) & in(x1,x2) & n_dog(x1) & a_yellow(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_snow(x3) & n_dog(x1) & for(e1,x2) & in(x2,x3) & n_ball(x2) & Actor(e1,x1) & v_look(e1))