Three youths standing at the top of stairs talking.
Three girls standing at the top of stairs talking.
Three youths standing at the top of stairs talking does not indicate that they are girls
exists e2 e1 x1 x2 x3 x4 x5.(n_top(x3) & a_topic(x1) & at(e1,x3) & of(x3,x4) & Actor(e2,x5) & v_talk(e2) & (x4 = x5) & n_stair(x4) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_youth(x1) & card_eq_3(x1))
exists e2 e1 x1 x2 x3 x4 x5.(n_top(x3) & a_topic(x1) & at(e1,x3) & of(x3,x4) & Actor(e2,x5) & v_talk(e2) & (x4 = x5) & n_stair(x4) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_girl(x1) & card_eq_3(x1))