A dog running with something in its mouth
A dog playing fetch.
Just because the dog has something in its mouth, does not mean it is playing fetch.
exists e1 x1 x2 x3 x4.(a_topic(x1) & with(e1,x3) & in(x3,x4) & n_mouth(x4) & of(x4,x1) & n_thing(x1) & n_thing(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_fetch(e1) & n_playing(x1) & of(x1,x2) & n_dog(x2))