Philip Norton Baron Norton of Louth - Philip Norton Baron Norton of Louth (born 5 March 1951) is an English author academic and Conservative peer. He has been described as the United Kingdom's greatest living expert on Parliament and a world authority on constitutional issues. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Office Holder