A child swims with a woman.
Two people in water.
A child and a woman make two people.
exists e1 x1 x2.(with(e1,x2) & n_woman(x2) & Actor(e1,x1) & v_swim(e1) & n_child(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_water(x2) & n_people(x1) & card_eq_2(x1))