Complex sentence: The band announced their intent to take a break from performing indefinitely after their last event of their 2012 tour in Dublin on November 12,2012, confirming previous speculation and rumours by fans that began circulating in September 2012.
Split into simpler sentences: The band announced their intent to split at their last event of their 2012 tour in Dublin on the 12th November. This confirmed previous speculation and rumours by fans that began circulating in September 2012.