A white dog is standing in a pond.
A dog is plating with a ball in a pond.
Dogs can do more at a pond than just be playing with a ball.
exists e1 s1 x1 x2.(in(e1,x2) & n_pond(x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1) & a_white(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(with(e1,x2) & in(x2,x3) & n_pond(x3) & n_ball(x2) & Actor(e1,x1) & v_plate(e1) & n_dog(x1))