Complex sentence: Rochdale Association Football Club is an English professional association football club, based in the town of Rochdale in Greater Manchester, England that play in the Football League One, the third tier in the English football league system.
Split into simpler sentences: Rochdale Association Football Club is an English professional association football club, based in the town of Rochdale in Greater Manchester, England. The club participates in the Football League One, the third tier in the English football league system.