A man standing on a locomotive working on it.
the man is covered in grease
There may be no grease on the man at all.
exists e2 e1 x1 x2 x3.(a_topic(x1) & for(e1,e2) & on(e2,x1) & n_thing(x1) & Actor(e2,x2) & v_working(e2) & on(e1,x3) & n_locomotive(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & in(e1,x2) & n_grease(x2) & Theme(e1,x1) & v_cover(e1))