Two adults on cellphones downtown.
Two adults are calling for a contest.
Just because there are two different adults on their cellphones does not mean that they are calling for a contest.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_downtown(x2) & of(x2,x3) & n_cellphone(x3) & n_adult(x1) & card_eq_2(x1))
exists e1 x1 x2.(for(e1,x2) & n_contest(x2) & Actor(e1,x1) & v_call(e1) & n_adult(x1) & card_eq_2(x1))