A man squatting in front a pile of objects.
A runner runs on a track.
One cannot be squatting and running at the same time.
exists e1 x1 x2.(a_topic(x1) & all x3.(n_pile(x3) -> exists x4 x5.(in(e1,x4) & of(x4,x5) & n_object(x5) & for(x4,x3) & n_front(x4))) & Actor(e1,x2) & v_squat(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_track(x2) & Actor(e1,x1) & v_run(e1) & n_runner(x1))