Two swans swimming in the water.
The two swans are mates.
Answer :The fact that two swans are swimming in the water does not mean they are mates
exists x1 x2 x3.(n_water(x3) & a_topic(x1) & in(x1,x3) & n_swimming(x1) & of(x1,x2) & n_swan(x2) & card_eq_2(x1))
exists p1 x1.(n_swan(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_mate(x2)))