Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Jack Austin -  For the Australian Rules Football player see Jack Austin (footballer).Jacob Jack Austin PC OBC (born March 2 1932) is a Canadian former politician and former member of the Canadian Senate. He was appointed to the upper house by Prime Minister Pierre Trudeau on August 8 1975 and represented British Columbia. At the time of his retirement he was the longest serving Senator.
A:
Office Holder