people are posing for fans at the horse hurdle jumping games
The horse jockeys pose for pictures.
One fan may be posing for another fan.  It may not be the horse jockeys who are posing.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_hurdle(x3) & of(x3,x4) & n_horse(x4) & at(e1,x3) & Theme(e2,x6) & Actor(e2,x5) & v_jump(e2) & n_game(x6) & (x3 = x5) & for(e1,x2) & n_fan(x2) & Actor(e1,x1) & v_pose(e1) & n_people(x1))
exists e1 x1 x2 x3.(n_jockey(x1) & of(x1,x2) & n_horse(x2) & for(e1,x3) & n_picture(x3) & Actor(e1,x1) & v_pose(e1))