The wood used for the seat portion of the bench is comprised of different colored slats.
The bench is made completely of black metal.
The bench is either completely black or different colored.
exists e4 e2 e3 e1 x1 x2 x3 x4 x5 x6 x7.(n_slat(x7) & Theme(e4,x7) & v_color(e4) & n_bench(x5) & n_portion(x3) & of(x3,x4) & n_seat(x4) & n_wood(x1) & of(e2,x6) & -(x6 = x7) & n_slat(x6) & Theme(e3,x6) & v_color(e3) & Theme(e2,x1) & v_comprise(e2) & for(e1,x3) & of(x3,x5) & Theme(e1,x2) & v_use(e1) & (x1 = x2))
exists e1 s1 x1 x2.(n_bench(x1) & r_completely(e1) & of(e1,x2) & n_metal(x2) & a_black(s1) & Theme(s1,x2) & Theme(e1,x1) & v_make(e1))