premise: A person on a bike is midair, twisting his body around the handlebars, with graffiti behind him.
hypothesis: A person is riding a vehicle.
explanation_1: A bike is form of vehicle.  Twisting your body around the handlebars mean you're riding/using the vehicle.
explanation_2: A bike implies that the person is riding a vehicle.
explanation_3: a bike is legally considered a vehicle.
premise_logic: exists e1 p1 x1 x2 x3 x4 x5.(n_male(x4) & n_handlebars(x4) & for(p1,e1) & with(e1,x5) & behind(x5,x4) & n_graffitus(x5) & around(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_twist(e1) & n_body(x3) & of(x3,x1) & n_male(x1) & exists x6.((x1 = x6) & n_midair(x6)) & on(x1,x2) & n_bike(x2) & n_person(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_vehicle(x2) & n_person(x1))
premise_sim: exists e1 p1 x1 x2 x3 x4 x5.(with(e1,x5) & v_twist(e1) & on(x1,x2) & of(x3,x1) & n_person(x1) & n_male(x4) & n_male(x1) & n_handlebars(x4) & n_graffitus(x5) & n_body(x3) & n_bike(x2) & for(p1,e1) & exists x6.(n_midair(x6) & (x1 = x6)) & behind(x5,x4) & around(e1,x4) & Theme(e1,x3) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_ride(e1) & n_vehicle(x2) & n_person(x1) & Theme(e1,x2) & Actor(e1,x1))