A race dog with the number seven runs fast on a dog track.
The dog is a greyhound.
greyhound doesn't always mean race dog
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_run(x4) & card_eq_7(x4) & of(x4,x5) & n_number(x5) & on(e1,x6) & n_track(x6) & of(x6,x7) & n_dog(x7) & fast(e1,x2) & with(x2,x4) & n_dog(x2) & of(x2,x3) & n_race(x3) & Actor(e1,x1) & v_event(e1) & n_thing(x1))
exists p1 x1.(n_dog(x1) & exists x2.((x1 = x2) & n_greyhound(x2)))