premise: A young man is riding a dirt bike while standing up.
hypothesis: The young man stands on the pedals of his dirt bike.
explanation_1: A young man is riding a dirt bike while standing up means he must be standing on the pedals of his dirt bike.
explanation_2: Riding a dirt bike implies on the pedals of his dirt bike.
explanation_3: A young man is riding a dirt bike.
premise_logic: exists e1 e2 s1 s2 x1 x2 x3.(while(e1,e2) & a_up(s2) & Manner(e2,s2) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_man(x1) & a_young(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(n_bike(x3) & of(x3,x4) & n_dirt(x4) & of(x3,x2) & n_male(x2) & n_pedal(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1) & on(e1,x2) & of(x2,x3) & Actor(e1,x1) & v_stand(e1))