A jockey in blue on a race horse trails behind the jockey in orange.
An orange dressed jockey rides a horse and a second follows dressed in blue.
Just because the guy in blue rides a horse doesn't mean the jockey in orange is also on a horse.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & on(x2,x3) & behind(x3,x1) & in(x1,x6) & n_orange(x6) & n_jockey(x1) & n_jockey(x1) & n_trail(x3) & of(x3,x5) & n_horse(x5) & of(x3,x4) & n_race(x4) & n_blue(x2))
exists e4 e1 e3 e2 s1 x1 x2 x3 x4 x5.(for(e3,e4) & Theme(e4,s1) & Theme(s1,x5) & a_blue(s1) & Theme(e4,x4) & v_dress(e4) & Actor(e3,x4) & v_follow(e3) & n_second(x4) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & n_horse(x3) & n_jockey(x1) & Theme(e1,x1) & v_dress(e1) & of(x1,x2) & n_orange(x2))