A black dog stands on top of a brown dog on the grass.
Two dogs are playing in the grass with a ball.
Just because a black dog stands on a brown dog does not mean they are playing with a ball.
exists e1 s1 s2 x1 x2 x3 x4.(n_grass(x4) & on(e1,x2) & of(x2,x3) & on(x3,x4) & n_dog(x3) & a_brown(s2) & Theme(s2,x3) & n_top(x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_grass(x2) & with(e1,x3) & n_ball(x3) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))