Complex sentence: On September 29th 2008 A&W officially launched a new permanent burger, the Uncle Burger, familiar to anyone who had the Sirloin burger months previous, as it is the same burger.
Split into simpler sentences: On September 29th 2008 A&W officially launched a permanent burger. The Uncle Burger, which is familiar to anyone who had the sirloin burger months previous, as it is the same burger.