Children playing on a trampoline.
Children are jumping for a birthday on a trampoline.
You can not infer they are jumping.
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 e1 x1 x2 x3.(on(e1,x3) & n_trampoline(x3) & for(e1,x2) & n_birthday(x2) & Actor(e1,x1) & v_jump(e1) & n_child(x1))