A brunette man is welding a stair rail.
A superintendent is fixing a complaint.
Not all men are a superintendent.
exists e1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_weld(e1) & n_rail(x3) & of(x3,x4) & n_stair(x4) & n_man(x1) & of(x1,x2) & n_brunette(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_fix(e1) & n_complaint(x2) & n_superintendent(x1))