Question: Thomas Ryder Johnson (17 May 1872 17 January 1963) was an Irish nationalist politician trade unionist and leader of the Irish Labour Party who served as a Teachta Dala (TD) for Dublin County from 1922 to 1927.Born in Liverpool Johnson moved to Ireland in the 1890s when he became involved in trade union and labour politics. 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?
Answer:
Office Holder