premise: Three motorcyclists are racing on dirt bikes.
hypothesis: Three people are racing.
explanation_1: Motorcyclists are people, therefore if three motorcyclists are racing, three people are racing.
explanation_2: Motorcyclists are racing dirt bikes.
explanation_3: The sentences say the same thing. The only difference is the amount detail. Motorcyclists are people.
premise_logic: exists e1 x1 x2 x3.(on(e1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_race(e1) & n_motorcyclist(x1) & card_eq_3(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_race(e1) & n_people(x1) & card_eq_3(x1))
premise_sim: exists e1 x1 x2 x3.(v_race(e1) & on(e1,x2) & of(x2,x3) & n_motorcyclist(x1) & n_dirt(x3) & n_bike(x2) & card_eq_3(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1.(v_race(e1) & n_people(x1) & card_eq_3(x1) & Actor(e1,x1))