Children playing on a trampoline.
Children are in a ball pit.
They cannot be on a trampoline and in a ball pit at the same time.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_trampoline(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_pit(x2) & of(x2,x3) & n_ball(x3)) & n_child(x1))