Two brown dogs play or fight.
two dogs is racing on a track
Dogs that are racing are not playing or fighting.
(exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_thing(x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1) & card_eq_2(x1)) | exists e2 s2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_fight(e2) & n_thing(x4) & n_dog(x3) & a_brown(s2) & Theme(s2,x3) & card_eq_2(x3)))
exists e1 x1 x2.(on(e1,x2) & n_track(x2) & Actor(e1,x1) & v_race(e1) & n_dog(x1) & card_eq_2(x1))