The man is on a ski boat in the water.
There is a man wearing a wetsuit on a blue ski boat in a lake.
The man is on a ski boat in the water but not wearing a wetsuit.
exists p1 x1 x4.(n_water(x4) & n_man(x1) & exists x2 x3.(on(x1,x2) & in(x2,x4) & n_boat(x2) & of(x2,x3) & n_ski(x3)))
exists p1 x1 e1 s1 x2 x3 x4 x5 x6 x7.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & on(x4,x5) & in(x5,x7) & n_lake(x7) & n_boat(x5) & of(x5,x6) & n_ski(x6) & a_blue(s1) & Theme(s1,x5) & n_wetsuit(x4) & (x2 = x3) & n_man(x2))