3 jockeys riding horses wearing green, pink, and beige.
They are participating in a derby.
Three jockeys riding horses doesn't necessarily mean they're participating in a derby.
exists e1 e2 p1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_ride(e2) & subset_of(x6,x3) & n_beige(x6) & subset_of(x4,x3) & exists s1 s2.(Theme(s2,x5) & a_pink(s2) & Theme(s1,x5) & a_green(s1)) & Topic(e1,p1) & Actor(e1,x5) & v_wear(e1) & (x4 = x5) & n_horse(x4) & (x1 = x2) & n_jockey(x1) & n_date(x1) & a_date_day_03(x1) & a_date_day_03(x1))
exists e1 x1.(in(e1,x1) & n_derby(x1) & Actor(e1,x1) & v_participate(e1) & n_thing(x1))