A tan dog is playing with the green ball.
The dog's owner is playing with it.
Not all dogs play with their owner.
exists e1 s1 s2 x1 x2.(n_ball(x2) & a_green(s2) & Theme(s2,x2) & with(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_tan(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_thing(x1) & n_owner(x2) & of(x2,x1) & n_dog(x1) & with(e1,x1) & Actor(e1,x2) & v_play(e1))