A man on a waterski is performing a jump in the air.
a woman on a water ski
Man and woman are different.
exists e1 x1 x2 x3 x4.(n_air(x4) & Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & in(x3,x4) & n_jump(x3) & on(x1,x2) & n_waterskus(x2) & n_man(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_ski(x2) & of(x2,x3) & n_water(x3) & n_woman(x1))