premise: A man jumps onto a skateboard that is sitting on a folding chair.
hypothesis: The man is attempting to do a skateboard trick.
explanation_1: A man jumping onto a skateboard infers a man attempting a skateboard trick.
explanation_2: A man jumping onto a skateboard that is sitting on a chair would indicate that he's attempting a skateboard trick.
explanation_3: A man attempts to do a skateboard trick sitting on a folding chair.
premise_logic: exists e1 e2 s1 x1 x2 x3 x4.(onto(e1,x2) & on(e2,x4) & n_chair(x4) & a_folding(s1) & Theme(s1,x4) & Actor(e2,x3) & v_sit(e2) & (x2 = x3) & n_skateboard(x2) & Actor(e1,x1) & v_jump(e1) & n_man(x1))
hypothesis_logic: exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_attempt(e1) & exists e2 x2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_trick(x2) & of(x2,x3) & n_skateboard(x3)))