Children play on a giant work of art.
Kids are playing.
Kids is another way of identifying children.
exists e1 s1 x1 x2 x3.(on(e1,x2) & of(x2,x3) & n_art(x3) & n_work(x2) & a_giant(s1) & Theme(s1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_kid(x1))