A man stands on a four-wheeled board attached to a harness.
A man is rolling down the street on a board, pulled by a horse.
Stands on does not imply rolling down and attached to a harness does not imply being pulled by a horse.
exists e2 e1 s1 x1 x2 x3 x4.(on(e1,x2) & to(e2,x4) & n_harness(x4) & Theme(e2,x3) & v_attach(e2) & (x2 = x3) & n_board(x2) & a_four-wheeled(s1) & Theme(s1,x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists e2 e1 s1 x1 x2 x3 x4 x5.(n_street(x2) & on(e1,x3) & Actor(e2,x5) & n_horse(x5) & Theme(e2,x4) & v_pull(e2) & (x3 = x4) & n_board(x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_roll(e1) & n_man(x1))