A woman is standing front of a sign.
The woman is standing in front of a shop sign.
You can not infer it's a shop sign.
exists p1 x1.(exists e1 x2 x3.((x1 = x2) & of(x2,x3) & n_sign(x3) & n_front(x2) & Actor(e1,x2) & v_stand(e1)) & n_woman(x1))
exists e1 x1 x2 x3 x4.(n_woman(x1) & in(e1,x2) & of(x2,x3) & n_sign(x3) & of(x3,x4) & n_shop(x4) & n_front(x2) & Actor(e1,x1) & v_stand(e1))