premise: Two racers race on motorcycles.
hypothesis: Two people are racing in a tournament.
explanation_1: People can race without being in a tournament.
explanation_2: Not all racers will be in a tournament.
explanation_3: The two men racing on motorcycles may not be in a tournament.
premise_logic: exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_motorcycle(x3) & n_race(x1) & of(x1,x2) & n_racer(x2) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(in(e1,x2) & n_tournament(x2) & Actor(e1,x1) & v_race(e1) & n_people(x1) & card_eq_2(x1))