Green grass field, a black dog running after a ball.
A dog is running after a ball.
A dog running after a ball does just that.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & rel(x1,x4) & after(e1,x6) & n_ball(x6) & Actor(e1,x5) & v_run(e1) & (x4 = x5) & n_dog(x4) & a_black(s1) & Theme(s1,x4) & n_field(x1) & of(x1,x3) & n_grass(x3) & (x1 = x2) & ne_nam_green(x2))
exists e1 x1 x2.(after(e1,x2) & n_ball(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))