A multicolor dog chasing after a ball across the grass.
A multicolor dog is playing in the grass.
A dog is chasing a ball therefore he must be playing.
exists s1 x1 x2 x3 x4.(n_grass(x4) & a_topic(x1) & after(x1,x3) & across(x3,x4) & n_ball(x3) & n_chasing(x1) & of(x1,x2) & n_dog(x2) & a_multicolor(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & a_multicolor(s1) & Theme(s1,x1))