Three youths standing at the top of stairs talking.
Kids playing at the park.
If they are at the top of the stairs talking they are not outside playing at the park.
exists e1 e2 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 e1 x1 x2 x3.(n_park(x3) & a_topic(x1) & at(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_kid(x1))