premise: A skateboarder does a trick in midair.
hypothesis: A roller skater doing a back flip.
explanation_1: Skateboarder is not a roller skater.
explanation_2: Answer: One cannot trick in midair while he is doing a back flip.
explanation_3: person can't be a roller skater if the are skateboarder
premise_logic: exists e1 x1 x2 x3.(in(e1,x3) & n_midair(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_skateboarder(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_flip(x4) & a_back(s1) & Theme(s1,x4) & (x1 = x3) & n_skater(x1) & of(x1,x2) & n_roller(x2))