A black and white dog is running through grass.
A dog is running while playing fetch
The dog doesn't have to be playing fetch while running.
exists e1 s1 s2 x1 x2.(through(e1,x2) & n_grass(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1))
exists e2 e1 s1 x1.(while(e1,e2) & a_fetch(s1) & Manner(e2,s1) & Actor(e2,x1) & v_play(e2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))