The two greyhounds are racing around a corner.
Two dogs lay on the carpet.
One cannot be racing and laying at the same time.
exists e1 x1 x2.(n_greyhound(x1) & card_eq_2(x1) & around(e1,x2) & n_corner(x2) & Actor(e1,x1) & v_race(e1))
exists e1 x1 x2.(n_carpet(x2) & on(e1,x2) & Actor(e1,x1) & v_lay(e1) & n_dog(x1) & card_eq_2(x1))