A horse rider jumping a jump.
The horse rider is walking the horse.
Either he is walking the horse or jumping on horse.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_jump(e1) & n_jump(x4) & (x1 = x3) & n_rider(x1) & of(x1,x2) & n_horse(x2))
exists e1 x1 x2.(n_horse(x2) & n_horse(x2) & n_rider(x1) & of(x1,x2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1))