Please answer the following question: The Elgin-Middlesex Detention Centre is a maximum security prison located in London Ontario. Concerns have recently been raised about the security of the staff and visitors at the prison as well as prison overcrowding. 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:
Building