Given the question: 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. HM Prison Elmley - HM Prison Elmley is a local Category B/C men's prison located close to the village of Eastchurch on the Isle of Sheppey Kent. The term 'local' means that this prison holds people on remand to the local courts. Elmley forms part of the Sheppey prisons cluster which also includes HMP Standford Hill and HMP Swaleside. The prison is operated by Her Majesty's Prison Service.
The answer is:
Building