A dog with a frisbee in its mouth.
A dog is playing fetch.
Because the Frisbee is in the dogs mouth does not mean it is playing  fetch.
exists x1 x2 x3.(a_topic(x1) & with(x1,x2) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_frisbee(x2) & n_dog(x1))
exists e1 s1 x1.(a_fetch(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & n_dog(x1))