A woman is holding a child.
A person holds a boy.
A woman holding a child doesn't necessarily mean the child is a boy.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & n_woman(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_boy(x2) & n_person(x1))