Maj Lillemor Arvidsson (1 May 1943 23 April 2012) was a Swedish trade union leader and the Governor of Gotland from 1998 to 2004.Arvidsson trained as a nurse and later worked as a nursing assistant at Uddevalla Hospital. Arvidsson engaged simultaneously in trade union work. In 1972 she was employed by the Swedish Municipal Workers' Union as an academic ombudsman. 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