The woman is wearing a necklace but has no other visible jewelry.
the necklace is expensive
It is not known how much the necklace cost so one cannot assume that the necklace is expensive.
exists e1 s2 x1 x2 x4.(n_jewelry(x4) & a_visible(s2) & Theme(s2,x4) & n_woman(x1) & -exists e2 s1 x3.(Theme(e2,x3) & Actor(e2,x1) & v_have(e2) & -(x3 = x4) & n_jewelry(x3) & a_visible(s1) & Theme(s1,x3)) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_necklace(x2))
exists s1 x1.(n_necklace(x1) & Theme(s1,x1) & a_expensive(s1))