Two jockeys on their horses on a racetrack.
The jockeys are at a restaurant.
People cannot be on their horses on a racetrack and at a restaurant at the same time.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & on(x2,x3) & n_racetrack(x3) & n_horse(x2) & of(x2,x1) & n_thing(x1) & n_jockey(x1) & card_eq_2(x1))
exists p1 x1.(n_jockey(x1) & exists x2.(at(x1,x2) & n_restaurant(x2)))