A man on a skateboard jumps over some obstacles.
The person has a skateboard.
If the man is on a skateboard you have it.
exists e1 x1 x2 x3.(over(e1,x3) & n_obstacle(x3) & Actor(e1,x1) & v_jump(e1) & on(x1,x2) & n_skateboard(x2) & n_man(x1))
exists e1 x1 x2.(n_person(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_skateboard(x2))