Please answer the following question: John Millson (Canadian politician) - John Millson is a Canadian politician and businessman. He served as mayor of Windsor Ontario from 1988 to 1991 later becoming president of the Windsor Raceway. In 2009 he co-founded Great Lakes Energy Limited. As of 2011 he has been rumored to be a contender for Member of Provincial Parliament of West Windsor. 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?
Answer:
Office Holder