Simplify the following text for a Grade 11 native English-speaking person.
Original: Hell in a Cell was a professional wrestling pay-per-view ( PPV ) event produced by World Wrestling Entertainment ( WWE ) , which took place on October 4 , 2009 at the Prudential Center in Newark , New Jersey .
Simplified: WWE Hell in a Cell is a professional wrestling event produced annually by World Wrestling Entertainment , a Connecticutâ `` based promotion , and broadcast live and available only through pay-per-view ( PPV ) . The event was established in 2009 , replacing No Mercy in the early October slot of WWE 's pay-per-view calendar .