An older man shows how to use a machine.
The man is the bossman at work.
Showing someone how to use the machine does not imply he is the bossman.
exists e1 s1 x1 x2.(Topic(e1,x2) & Actor(e1,x1) & v_show(e1) & n_manner(x2) & exists e2 x3 x4.(Theme(e2,x4) & Actor(e2,x3) & v_use(e2) & n_machine(x4)) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_bossman(x2) & n_man(x1) & exists x3.((x1 = x2) & at(x2,x3) & n_work(x3)))