Two boys dig in the sand on a beach.
Two boys are looking for buried treasure at the beach.
It isn't clear they are looking for treasure, as buried treasure can also be found underwater, not just in the sand.
exists x1 x2 x3 x4.(n_sand(x3) & a_topic(x1) & on(x1,x4) & n_beach(x4) & in(x1,x3) & n_dig(x1) & of(x1,x2) & n_boy(x2) & card_eq_2(x1))
exists e2 e1 x1 x2 x3.(n_beach(x3) & for(e1,x2) & at(x2,x3) & n_treasure(x2) & Theme(e2,x2) & v_bury(e2) & Actor(e1,x1) & v_look(e1) & n_boy(x1) & card_eq_2(x1))