A jockey in yellow and a jockey in blue are racing their horses down a grassy raceway.
People are riding horses.
They have to be riding in order to be racing.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(down(e1,x7) & n_raceway(x7) & a_grassy(s1) & Theme(s1,x7) & Theme(e1,x6) & Actor(e1,x1) & v_race(e1) & n_horse(x6) & of(x6,x2) & n_thing(x2) & subset_of(x4,x1) & in(x4,x5) & n_blue(x5) & n_jockey(x4) & subset_of(x2,x1) & in(x2,x3) & n_yellow(x3) & n_jockey(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2) & n_people(x1))