premise: A person doing a trick on a snowboard.
hypothesis: A pro snowboarder is competing in the Olympics.
explanation_1: Not all people are pro snowboarders.  Doing a trick on a snowboard does not imply competing in the Olympics.
explanation_2: A person doing a trick is not necessarily a pro.
explanation_3: Although they are doing a trick, it does not imply that they are a pro snowboarder.  It also doesn't imply that they are competing in the Olympics.
premise_logic: exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & on(x3,x4) & n_snowboard(x4) & n_trick(x3) & (x1 = x2) & n_person(x1))
hypothesis_logic: exists e1 s1 x1 x2.(n_olympics(x2) & in(e1,x2) & Actor(e1,x1) & v_compete(e1) & n_snowboarder(x1) & a_pro(s1) & Theme(s1,x1))
premise_sim: exists e1 x1 x2 x3 x4.(v_do(e1) & on(x3,x4) & n_trick(x3) & n_snowboard(x4) & n_person(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))
hypothesis_sim: exists e1 s1 x1 x2.(v_compete(e1) & n_snowboarder(x1) & n_olympics(x2) & in(e1,x2) & a_pro(s1) & Theme(s1,x1) & Actor(e1,x1))