A man is skiing in water.
The man is participating in a water sport.
Skiing is  a water sport.
exists e1 x1 x2.(in(e1,x2) & n_water(x2) & Actor(e1,x1) & v_ski(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & in(e1,x2) & n_sport(x2) & of(x2,x3) & n_water(x3) & Actor(e1,x1) & v_participate(e1))