People looking up at the sky at something.
People look up.
in a both sentence sky and look is different
exists e1 s1 x1 x2 x3.(n_sky(x2) & a_up(s1) & Manner(e1,s1) & at(e1,x2) & at(x2,x3) & n_thing(x3) & Actor(e1,x1) & v_look(e1) & n_people(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_up(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1) & n_people(x1))