The wood used for the seat portion of the bench is comprised of different colored slats.
The bench is made of wood.
When referring to wood used for a portion of a bench, one may assume that the bench is made of wood.
exists e4 e3 e2 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 x1 x2.(n_bench(x1) & of(e1,x2) & n_wood(x2) & Theme(e1,x1) & v_make(e1))