Two women in bikinis play on the beach.
Two women are at the beach.
On the beach and at the beach mean the same thing.
exists x1 x2 x3 x4.(n_beach(x4) & a_topic(x1) & in(x1,x2) & on(x2,x4) & n_play(x2) & of(x2,x3) & n_bikini(x3) & n_woman(x1) & card_eq_2(x1))
exists p1 x1 x2.(n_beach(x2) & at(x1,x2) & n_woman(x1) & card_eq_2(x1))