A man jumping on a skiing board.
A man is riding a board.
One must be riding a skiing board to make a jump on a skiing board.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_board(x3) & of(x3,x4) & n_skiing(x4) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_board(x2) & n_man(x1))