Complex sentence: Sara Berner (January 12,1912--December 19,1969) was an American film, television and radio actress, best known for her role as telephone operator Mabel Flapsaddle on "The Jack Benny Program".
Split into simpler sentences: Sara Berner (January 12,1912--December 19,1969) was an American radio, television and film actress. She is also known for her role as telephone operator Mabel Flapsaddle on "The Jack Benny Program".