Two jockeys race horses
There are two people and horses.
Two people is a rephrasing on two jockeys.
exists x1 x2 x3.(a_topic(x1) & Time(x1,x3) & n_horse(x3) & n_race(x1) & of(x1,x2) & n_jockey(x2) & card_eq_2(x1))
exists p1 x1 x2 x3 x4.((x1 = x2) & subset_of(x4,x2) & n_horse(x4) & subset_of(x3,x2) & n_people(x3) & card_eq_2(x3))