original: it has been suggested that vättern is the largest body of potable water in the world .
simplifications: it has been suggested that vättern is the largest body of drinkable water in the world . vättern is thought to be the largest body of drinkable water in the world . some say that vätterrn is the largest body of drinkable water in the world . it has been suggested that vättern is the largest body of potable water in the world . it has been suggested that vattern is the largest body of potable water in the world . vättern is the largest body of potable water in the world . it has been thought that vättern is the biggest body of clean water in the world . it has been suggested that vattern is the largest body of potable water in the earth .