A woman is holding a child.
The woman is holding something.
The something that the woman is holding is a child, however that fact may be obscured in the second sentence.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & n_woman(x1))
exists e1 x1 x2.(n_woman(x1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_thing(x2))