A dog runs through the snow.
A dog chases a ball through the snow.
a dog could be running through the snow without chasing a ball
exists e1 x1 x2.(n_snow(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2 x3.(n_snow(x3) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2) & n_dog(x1))