Complex sentence: Since the opening of Harriton High School in 1957, the school newspaper had been called either the "Harriton Forum" or the "Harriton Free Forum", but in October 2006 it was renamed "The Harriton Banner".
Split into simpler sentences: Since the opening of Harriton High School in 1957, the school newspaper had been called the "Harriton Forum" or the "Harriton Free Forum". In October 2006 it was renamed "The Harriton Banner".