A woman is holding a child.
The child is not hers.
A woman holding a child doesn't mean it's not hers.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & n_woman(x1))
exists x1.(n_child(x1) & -exists p1 x2.((x1 = x2) & n_hers(x2)))