premise: Four motorcycles are racing on a dirt track.
hypothesis: four motorcycles are racing
explanation_1: Four motorcycles are racing is just a shorter rephrasing of four motorcycles are racing on a dirt track.
explanation_2: Both sentences state four motorcycles are racing. The only difference is that the first sentence saying where they are racing.
explanation_3: On a racing of motorcycle on a dirt track, The dirt spluttered over the people on the sidewalks.
premise_logic: exists e1 x1 x2 x3.(on(e1,x2) & n_track(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_race(e1) & n_motorcycle(x1) & card_eq_4(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_race(e1) & n_motorcycle(x1) & card_eq_4(x1))
premise_sim: exists e1 x1 x2 x3.(v_race(e1) & on(e1,x2) & of(x2,x3) & n_track(x2) & n_motorcycle(x1) & n_dirt(x3) & card_eq_4(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1.(v_race(e1) & n_motorcycle(x1) & card_eq_4(x1) & Actor(e1,x1))