premise: Man racing a quad on a dirt racetrack.
hypothesis: A man racing on a dirt track.
explanation_1: Dirt racetrack is a dirt track.
explanation_2: The man is racing on a track.
explanation_3: Racing a quad is a type of racing.
premise_logic: exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_race(e1) & on(x3,x4) & n_racetrack(x4) & of(x4,x5) & n_dirt(x5) & n_quad(x3) & (x1 = x2) & n_man(x1))
hypothesis_logic: exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & n_track(x3) & of(x3,x4) & n_dirt(x4) & n_racing(x1) & of(x1,x2) & n_man(x2))