premise: Two race horses run down the track with number four ahead of number five.
hypothesis: A horse race is in progress.
explanation_1: A horse race involves horses with clear numbers on them, such as number four and number five.  If horses wearing such numbers are running down a track, they are most likely in a horse race.
premise_logic: exists e1 x1 x2 x3 x4 x5 x6.(n_track(x3) & down(e1,x3) & with(x3,x4) & n_four(x4) & of(x5,x6) & n_number(x6) & card_eq_5(x6) & ahead(x4,x5) & n_thing(x5) & n_number(x4) & Actor(e1,x1) & v_run(e1) & n_horse(x1) & of(x1,x2) & n_race(x2) & card_eq_2(x1))
hypothesis_logic: exists p1 x1 x2.(exists x3.(in(x1,x3) & n_progress(x3)) & n_race(x1) & of(x1,x2) & n_horse(x2))
premise_sim: exists e1 x1 x2 x3 x4 x5 x6.(with(x3,x4) & v_run(e1) & of(x5,x6) & of(x1,x2) & n_track(x3) & n_thing(x5) & n_race(x2) & n_number(x6) & n_number(x4) & n_horse(x1) & n_four(x4) & down(e1,x3) & card_eq_5(x6) & card_eq_2(x1) & ahead(x4,x5) & Actor(e1,x1))
hypothesis_sim: exists x1 x2.(of(x1,x2) & n_race(x1) & n_horse(x2) & exists x3.(n_progress(x3) & in(x1,x3)))