premise: Black greyhound dog racing down a track.
hypothesis: The dog is on the track.
explanation_1: A greyhound is a dog.
explanation_2: Racing down a track requires being on the track.
explanation_3: Black greyhound dog is a type of dog.
premise_logic: exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x5) & Actor(e1,x4) & v_race(e1) & n_track(x5) & (x1 = x4) & n_dog(x1) & of(x1,x3) & n_greyhound(x3) & (x1 = x2) & ne_nam_black(x2))
hypothesis_logic: exists p1 x1 x2.(n_track(x2) & n_dog(x1) & on(x1,x2))