An older man sawing a piece of metal on the edge.
An older man is holding a saw.
Both sentences imply that the older man is using a saw.
exists e1 s1 x1 x2 x3 x4 x5.(n_edge(x5) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_saw(e1) & on(x3,x5) & of(x3,x4) & n_metal(x4) & n_piece(x3) & (x1 = x2) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_saw(x2) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))