Complex sentence: Extreme Rules is an upcoming professional wrestling pay-per-view (PPV) event to be produced by WWE, scheduled to take place at the Allstate Arena in Rosemont, Illinois on April 29,2012.
Split into simpler sentences: Extreme Rules is an upcoming professional wrestling pay-per-view (PPV) event to be produced by WWE. It's scheduled to take place at the Allstate Arena in Rosemont, Illinois on April 29,2012.