premise: A man is doing tricks on a skateboard.
hypothesis: A human doing tricks
explanation_1: A man is a category of human.
explanation_2: A man is a human and tricks are tricks no matter where or on what they are done, thus, sentence 2 is a generalization of sentence 1.
explanation_3: tricks on a skateboard is inferred as doing tricks
premise_logic: exists e1 x1 x2 x3.(on(e1,x3) & n_skateboard(x3) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_man(x1))
hypothesis_logic: exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_human(x1))
premise_sim: exists e1 x1 x2 x3.(v_do(e1) & on(e1,x3) & n_trick(x2) & n_skateboard(x3) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2 x3.(v_do(e1) & n_trick(x3) & n_human(x1) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & (x1 = x2))