A man on a snowboard jumping.
a man jumps
A man jumps while using a snowboard.
exists e1 x1 x2 x3.(a_topic(x1) & on(x1,x2) & Actor(e1,x3) & v_jump(e1) & (x2 = x3) & n_snowboard(x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & n_jump(x1) & of(x1,x2) & n_man(x2))