Two women at a campsite.
Two men are at a campsite, and are the only ones there.
Can only be two women or two men.
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_campsite(x2) & n_woman(x1) & card_eq_2(x1))
exists p1 p2 x1 x2 x4.(all x5.(n_one(x5) -> (x4 = x5)) & n_one(x4) & (x2 = x4) & r_there(x4) & n_man(x2) & card_eq_2(x2) & exists x3.(at(x1,x3) & n_campsite(x3)) & n_man(x1) & card_eq_2(x1))