premise: A gray-haired man rides a bike in front of a bus advertising Ironman.
hypothesis: An older man sits on a bus and watches people riding motorcycles.
explanation_1: The man that rides the bus contradicts the man that sits on a bus.
explanation_2: One who rides a bike in front of a bus cannot be the same person who sits on a bus simultaneously.
explanation_3: You can sit on a bus and ride a bike at the same time.
premise_logic: exists e1 s1 x1 x2 x3 x4 x5 x6.(in(e1,x3) & of(x3,x4) & ne_nam_ironman(x4) & of(x4,x6) & n_advertising(x6) & of(x4,x5) & n_bus(x5) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_man(x1) & a_gray-haired(s1) & Theme(s1,x1))
hypothesis_logic: exists e2 e1 p1 s1 s2 x1 x2 x3 x4.(exists e3 x5.(Theme(e3,x5) & Actor(e3,x4) & v_ride(e3) & n_motorcycle(x5)) & Recipient(e2,p1) & Actor(e2,x3) & Topic(e2,x4) & v_watch(e2) & n_people(x4) & n_man(x3) & r_more(s2) & a_older(s2) & Theme(s2,x3) & on(e1,x2) & n_bus(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1))