A person riding a sled down a snowy slope.
The sled is made of wood.
the sled could be made of anything not just wood
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & down(e1,x4) & n_slope(x4) & a_snowy(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_sled(x3) & (x1 = x2) & n_person(x1))
exists e1 x1 x2.(n_sled(x1) & of(e1,x2) & n_wood(x2) & Theme(e1,x1) & v_make(e1))