Complex sentence: The first stage of producing 347.5 MW will comprise 139 General Electric 2.5xl turbines with a height and blades diameters, a 2.5 MW capacity and will be operational by December 2009.
Split into simpler sentences: The first stage of producing 347.5 MW will comprise 139 General Electric 2.5xl turbines, which stand tall and have a blade diameter of. The wind farm will have a 2.5 MW capacity and will be operational by December 2009.