A man in work clothes is holding a chain.
A man is not holding a chain.
One cannot be holding and not holding a chain simultaneously.
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_hold(e1) & n_chain(x4) & in(x1,x2) & n_clothes(x2) & of(x2,x3) & n_work(x3) & n_man(x1))
exists x1.(-exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_chain(x2)) & n_man(x1))