Teenagers play in shopping carts of a rooftop.
Children are playing on shopping carts
Teenagers are not always considered to be children.
exists e1 x1 x2 x3 x4.(in(e1,x2) & of(x2,x4) & n_rooftop(x4) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & Actor(e1,x1) & v_play(e1) & n_teenager(x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_cart(x2) & of(x2,x3) & n_shopping(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1))