Complex sentence: The agency won Strategy Magazine's Agency of the Year in 2002,2003,2004 and 2005 and in 2005 also took Marketing Magazine's "Advertising Agency of the Year, 2005".
Split into simpler sentences: The agency won Strategy Magazine's Agency of the Year in 2002,2003,2004 and 2005. They doubled up in 2005, also taking Marketing Magazine's "Advertising Agency of the Year, 2005".