A Asian guy is making something out of metal.
The guy is making something out of wood.
A guy does not have to be Asian.  If something is made of metal it is not wood.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & of(x3,x4) & n_metal(x4) & out(x2,x3) & n_thing(x3) & n_thing(x2) & n_guy(x1) & a_asian(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4.(n_guy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & of(x3,x4) & n_wood(x4) & out(x2,x3) & n_thing(x3) & n_thing(x2))