Some of the trees on the side of the track are beginning to change color with the season.
Some of the living woods on the outside of the ring are starting to vary in appearance.
change color with the season implies they are starting to vary in appearance.
exists e1 p1 x1 x2 x3 x4 x6.(n_season(x6) & n_track(x4) & n_side(x3) & n_tree(x2) & Topic(e1,p1) & Actor(e1,x1) & v_begin(e1) & exists e2 x5.(with(e2,x6) & Theme(e2,x5) & Actor(e2,x1) & v_change(e2) & n_color(x5)) & of(x1,x2) & on(x2,x3) & of(x3,x4) & n_thing(x1))
exists e1 p1 x1 x2 x3 x4 x5.(n_ring(x5) & n_outside(x4) & n_wood(x2) & of(x2,x3) & n_living(x3) & Topic(e1,p1) & Actor(e1,x1) & v_start(e1) & exists e2 x6.(in(e2,x6) & n_appearance(x6) & Actor(e2,x1) & v_vary(e2)) & of(x1,x2) & on(x2,x4) & of(x4,x5) & n_thing(x1))