Complex sentence: The magazine, often referred to as the "' 80s fashion bible", tried to keep a finger on the pulse of youth culture for over two decades; its best selling period was in the mid- 1990s under editor Richard Benson.
Split into simpler sentences: The magazine, often referred to as the "' 80s fashion bible", tried to keep a finger on the pulse of youth culture for over two decades. Although its best selling period was in the mid 1990s under editor Richard Benson.