premise: The skateboarder is jumping his board in the air while another skateboarder watches.
hypothesis: A skateboarder is jumping.
explanation_1: In the air implies jumping.
explanation_2: A skateboarder is jumping is a part of the earlier sentence.
explanation_3: If the skateboarder is in the air, they are jumping.
premise_logic: exists e1 x1 x2 x3 x4 x5.(n_air(x3) & while(e1,x5) & n_watch(x5) & of(x5,x1) & n_skateboarder(x1) & n_skateboarder(x1) & -(x5 = x4) & n_watch(x4) & of(x4,x1) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_board(x2) & of(x2,x1) & n_male(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_jump(e1) & n_skateboarder(x1))