A male worker with a mask on his face.
A workman with a mask on is cutting 2x4's.
Just because  A male worker with a mask on his face does not mean he is cutting 2x4's.
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & on(x3,x4) & n_face(x4) & of(x4,x1) & n_male(x1) & n_mask(x3) & n_worker(x1) & of(x1,x2) & n_male(x2))
exists e1 s1 s2 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_cut(e1) & n_'s(x4) & a_2x4(s2) & Theme(s2,x4) & with(x1,x2) & Theme(s1,x3) & a_on(s1) & (x2 = x3) & n_mask(x2) & n_workman(x1))