A man helps a child jump into a swimming pool.
Nobody is jumping
Nobody is jumping is different from a man helping a child jump
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_help(e1) & into(x2,x4) & n_pool(x4) & of(x4,x5) & n_swimming(x5) & n_jump(x2) & of(x2,x3) & n_child(x3) & n_man(x1))
-exists e1 x1.(Actor(e1,x1) & v_jump(e1) & n_person(x1))