A woman sitting at a counter is looking up.
The woman is looking up at an airplane.
Just because the woman is looking up does not mean it is an airplane, there are many things that can be up.
exists e1 e2 s1 x1 x2 x3.(a_up(s1) & Manner(e2,s1) & Actor(e2,x1) & v_look(e2) & at(e1,x3) & n_counter(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_woman(x1))
exists e1 s1 x1 x2.(n_woman(x1) & a_up(s1) & Manner(e1,s1) & at(e1,x2) & n_airplane(x2) & Actor(e1,x1) & v_look(e1))