Boat sails in rough water.
A boat sails through the water
Not all boats sailing in rough water sail through the water.
exists e1 s1 x1 x2.(ne_nam_boat(x1) & in(e1,x2) & n_water(x2) & a_rough(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sail(e1))
exists e1 x1 x2.(n_water(x2) & through(e1,x2) & Actor(e1,x1) & v_sail(e1) & n_boat(x1))