Two people on a surfboard in the water
Two people are at the beach.
If you are on a surfboard you are at the beach.
exists x1 x2 x3.(n_water(x3) & a_topic(x1) & on(x1,x2) & in(x2,x3) & n_surfboard(x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1 x2.(n_beach(x2) & at(x1,x2) & n_people(x1) & card_eq_2(x1))