premise: A person rides a motorbike on a dirt path surrounded by trees.
hypothesis: The bike is black.
explanation_1: not all motorbikes are black.
explanation_2: Just because a person rides a motorbike doesn't mean the bike is black.
explanation_3: You can not infer the bike is black.
premise_logic: exists e2 e1 x1 x2 x3 x4 x5 x6.(Theme(e2,x2) & Actor(e2,x1) & v_ride(e2) & on(x2,x3) & Actor(e1,x6) & n_tree(x6) & Theme(e1,x5) & v_surround(e1) & (x3 = x5) & n_path(x3) & of(x3,x4) & n_dirt(x4) & n_motorbike(x2) & n_person(x1))
hypothesis_logic: exists s1 x1.(n_bike(x1) & Theme(s1,x1) & a_black(s1))