Complex sentence: In 1900,4,082 people lived there, and in 1910,4,621 lived there, but in the 2000 census, the borough population was 1,318 and held steady for the 2010 census at 1,228.
Split into simpler sentences: In 1900,4,082 people lived there, and in 1910,4,621 lived there. In the 2000 census, the borough population was 1,318 and held steady for the 2010 census at 1,228.