Complex sentence: On 24th August 2013, they performed on the Main Stage at Reading Festival before Eminem, during which MC Rage had to stop the show due to people being crushed at the front of the crowd.
Split into simpler sentences: On 24th August 2013, they performed on the Main Stage at Reading Festival before Eminem. During the performance, MC Rage had to stop the show due to people being crushed at the front of the crowd.