premise: A skateboarder getting ready to perform on a half-tube rink where there are trees in the background.
hypothesis: A person with a skateboard is preparing to do tricks.
explanation_1: Getting ready to perform is preparing to do tricks.
explanation_2: A skateboarder is someone who performs tricks with a skateboard.
explanation_3: A person with a skateboard can be called a skateboarder. A half-tube rink is a skateboard trick.
premise_logic: exists e1 p1 x1 x2 x7.(n_background(x7) & a_topic(x1) & exists p2 s1.(Topic(s1,p2) & Actor(s1,x2) & a_ready(s1) & exists e2 p3 x3 x4.(on(e2,x3) & exists p4 x5 x6.((x5 = x6) & in(x6,x7) & n_tree(x6)) & where(x3,p3) & n_rink(x3) & of(x3,x4) & n_half-tube(x4) & Actor(e2,x2) & v_perform(e2))) & Topic(e1,p1) & Actor(e1,x2) & v_get(e1) & (x1 = x2) & n_skateboarder(x1))
hypothesis_logic: exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_do(e2) & n_trick(x3)) & with(x1,x2) & n_skateboard(x2) & n_person(x1))