Q:William Amelius Aubrey de Vere Beauclerk 10th Duke of St Albans PC (15 April 1840 10 May 1898) styled Earl of Burford until 1849 was a British Liberal politician. He served as Captain of the Yeomen of the Guard under William Gladstone between 1868 and 1874. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Office Holder