Complex sentence: The second Edwardsville High School was completed in 1925, and has been expanded over the years creating a labyrinth of halls to form what is today Lincoln Middle School, on 145 West Street.
Split into simpler sentences: The second Edwardsville High School was completed in 1925. It was expanded over the years creating a labyrinth of halls to form what is today Lincoln Middle School, on 145 West Street.