premise: a skateboard performs a trick off a quarter pipe.
hypothesis: A skateboard does a trick without a skateboarder.
explanation_1: A skateboarder is required to perform a trick.
explanation_2: A skateboard is hanging on a shoulder of a skateboarder.
explanation_3: The skateboard either does a trick off a quarter pipe with or without a skateboarder.
premise_logic: exists e1 x1 x2 x3 x4.(off(e1,x3) & n_pipe(x3) & of(x3,x4) & n_quarter(x4) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & n_skateboard(x1))
hypothesis_logic: exists e1 x1 x2.(-exists x3.(with(e1,x3) & n_skateboarder(x3)) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_skateboard(x1))