premise: Rupert Murdoch is a business owner.
hypothesis: Keith Rupert Murdoch [ ˈmɜrdɒk ] , AC , KCSG ( born 11 March 1931 ) is an Australian-born American media mogul . Murdoch 's News Corporation acquired Twentieth Century Fox ( 1985 ) , HarperCollins ( 1989 ) , and The Wall Street Journal ( 2007 ) . By 2000 , Murdoch 's News Corporation owned over 800 companies in more than 50 countries , with a net worth of over $ 5 billion . On 1 July 2015 , Murdoch left his post as CEO of 21st Century Fox . Murdoch and his family own both 21st Century Fox and News Corp through the Murdoch Family Trust .