Two greyhounds race
two dogs are running
Greyhounds are a breed of dogs.
exists x1 x2.(n_race(x1) & of(x1,x2) & n_greyhound(x2) & card_eq_2(x1) & a_topic(x1))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_dog(x1) & card_eq_2(x1))