Complex sentence: By contrast, the Cadet Chapel Organ of the United States Military Academy, West Point, New York is a single organ, also built continuously over the years, and is larger still with more than 23,500 pipes.
Split into simpler sentences: By contrast, the Cadet Chapel Organ of the United States Military Academy, West Point, New York is a single organ. It has also been added to continuously over the years and is larger still with more than 23,500 pipes.