Complex sentence: Sumner Murray Redstone (born Sumner Murray Rothstein; May 27,1923) is an American media magnate, majority owner and Chairman of the Board of the National Amusements theater chain.
Split into simpler sentences: Sumner Murray Redstone (born Sumner Murray Rothstein; May 27,1923) is an American media magnate. He is the majority owner and Chairman of the Board of the National Amusements theater chain.