A few horses race each other on the track.
A few horses are sitting in their pens.
The horses cannot be racing if they are sitting in their pens.
exists x4.(n_track(x4) & all x1.(n_other(x1) -> exists s1 x2 x3.(a_topic(x2) & on(x2,x4) & for(x2,x1) & n_race(x2) & of(x2,x3) & n_horse(x3) & a_few(s1) & Theme(s1,x2))))
exists e1 s1 x1 x2.(in(e1,x2) & n_pen(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_sit(e1) & n_horse(x1) & a_few(s1) & Theme(s1,x1))