a man i a mountainous region is working with a circular piece of aluminum.
A man is building metal out of a piece of aluminum.
A man working with a circular piece of aluminum is not necessarily building metal.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5.(with(e2,x4) & of(x4,x5) & n_aluminum(x5) & n_piece(x4) & a_circular(s2) & Theme(s2,x4) & Actor(e2,x1) & v_work(e2) & Theme(e1,x3) & Actor(e1,x2) & v_i(e1) & n_region(x3) & a_mountainous(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(of(e1,x3) & of(x3,x4) & n_aluminum(x4) & n_piece(x3) & r_out(e1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_metal(x2) & n_man(x1))