Two naked young boys play in the water.
Two boys in swim trunks are lounging beside the water.
Person who is naked can not have swim trunks at the same time.
exists e1 s1 s2 x1 x2.(n_water(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s2) & Theme(s2,x1) & a_naked(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_water(x4) & beside(e1,x4) & Actor(e1,x1) & v_lounge(e1) & in(x1,x2) & n_trunk(x2) & of(x2,x3) & n_swim(x3) & n_boy(x1) & card_eq_2(x1))