Two people sunbathe beside water.
There are two people.
There must be two people sunbathing beside water.
exists e1 x1 x2.(beside(e1,x2) & n_water(x2) & Actor(e1,x1) & v_sunbathe(e1) & n_people(x1) & card_eq_2(x1))
exists p1 x1 x2.((x1 = x2) & n_people(x2) & card_eq_2(x2))