Question:  Sir Anthony Francis Seldon is known in part for his biography of a British politician who identifies as what?
Sentence (from "Anthony Seldon"): Sir Anthony Francis Seldon, {'1': ", '2': ", '3': ", '4': "} (born 2 August 1953), is Vice-Chancellor of the University of Buckingham, a contemporary historian, commentator and political author, known in part for his biographies of Margaret Thatcher, John Major, Tony Blair, Gordon Brown and David Cameron.
Relevant evidence: Yes