Please answer the following question: Hastings Bertrand Lees-Smith PC (26 January 1878 18 December 1941) was a British Labour politician who was briefly in the cabinet as President of the Board of Education in 1931. He was the acting Leader of the Opposition and Leader of the Labour Party (as chairman of the Parliamentary Labour Party) from 1940 during the time Clement Attlee was in government. 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