A woman is wearing a blue headscarf and a blue sweater.
The woman is wearing nothing.
Blue headscarf and nothing are different.
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & subset_of(x4,x2) & n_sweater(x4) & a_blue(s2) & Theme(s2,x4) & subset_of(x3,x2) & n_headscarf(x3) & a_blue(s1) & Theme(s1,x3) & n_woman(x1))
exists x1.(n_woman(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_thing(x2)))