premise: A boy in a green shirt on a skateboard on a stone wall with graffiti
hypothesis: A long-haired boy riding his skateboard at a fast pace over a stone wall with graffiti.
explanation_1: Not all boys are long-haired. A skateboard does not always move fast.
explanation_2: A boy does not have to be long-haired.  The boy does not have to be riding at a fast pace.  Over is not the same as on.
explanation_3: The boy must not be long-haired and must not be on a skateboard at a fast pace.
premise_logic: exists s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x2) & on(x2,x3) & on(x3,x4) & with(x4,x6) & n_graffitus(x6) & n_wall(x4) & of(x4,x5) & n_stone(x5) & n_skateboard(x3) & n_shirt(x2) & a_green(s1) & Theme(s1,x2) & n_boy(x1))
hypothesis_logic: exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & with(e1,x7) & n_graffitus(x7) & over(e1,x5) & n_wall(x5) & of(x5,x6) & n_stone(x6) & at(e1,x4) & n_pace(x4) & a_fast(s2) & Theme(s2,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_skateboard(x3) & of(x3,x1) & n_male(x1) & (x1 = x2) & n_boy(x1) & a_long-haired(s1) & Theme(s1,x1))