Simplify the following text for a Grade 13 native English-speaking person.
Original: Mother Angelica or Mother Mary Angelica of the Annunciation ( born Rita Antoinette Rizzo on April 20 , 1923 ) is a Catholic nun on a television channel called EWTN ( Eternal Word Television Network ) .
Simplified: Mother Mary Angelica of the Annunciation , PCPA ( born Rita Antoinette Rizzo on April 20 , 1923 ) is an American Roman Catholic nun who founded the Eternal Word Television Network .