Please answer the following question: Alexander Peter Ross - Alexander Peter Ross (December 19 1831 October 18 1915) was an Ontario political figure. He represented Cornwall in the Legislative Assembly of Ontario from 1883 to 1886 as a Conservative member.He was born in Cornwall Township Upper Canada in 1833. Ross was a lumber merchant and building contractor. He served on the town council and was mayor of Cornwall. He died in Cornwall in 1915. 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?
A:
Office Holder