The three children are playing on the rails.
Kids flying a kite.
The kids are either playing on the rails or flying a kite.
exists e1 x1 x2.(n_rail(x2) & n_child(x1) & card_eq_3(x1) & on(e1,x2) & Actor(e1,x1) & v_play(e1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_fly(e1) & n_kite(x3) & (x1 = x2) & n_kid(x1))