Question: What is the 2015 population of the city that includes HM Prison Altcourse?

Context paragraphs:
HM Prison Geelong: HM Prison Geelong was a maximum security Australia prison located on the corner of Myers Street and Swanston Street in Geelong, Victoria, Australia.  The prison was built in stages from 1849 to 1864.  Its panopticon design is based on Pentonville Prison in England.  The prison was officially closed in 1991 and prisoners were moved to the newly built HM Prison Barwon in Lara.

HM Prison Acklington: HM Prison Acklington was a Category C men's prison, located near the village of Acklington a few miles from Amble), in Northumberland, England.  Acklington Prison was operated by Her Majesty's Prison Service.  In 2011 Acklington was merged into the newly named HM Prison Northumberland.

HM Prison Oakwood: HM Prison Oakwood, is a Category C prison in the village of Featherstone, Wolverhampton, in Staffordshire, England.  First opened in April 2012, the prison is operated by G4S and was aimed to be in full operation by autumn 2012.  Originally called Featherstone 2, and designed to be a titan prison, it was downsized to hold up to 1,605 prisoners with construction starting in August 2009 and built in a modular fashion, the first time this had been done in the UK.  Following the announcement that it would be contracted out to a private company along with HMP Birmingham, the Prison Officers Association threatened industrial action.  The prison received heavy criticism following a snap inspection by HM Inspector of Prisons.  A report published by the inspectorate in October 2013 identified several issues of concern, including a high level of violence at the jail.

HM Prison Moorland: HM Prison Moorland (formerly HM Prison Moorland Closed) is a Category C men's prison and Young Offenders Institution, near Hatfield Woodhouse in South Yorkshire, England.  The prison is operated by Her Majesty's Prison Service, and is jointly managed with the nearby Hatfield Prison.

Cann, Dorset: Cann is a village and civil parish in the county of Dorset in southern England.  It is situated on the A350 road in the North Dorset administrative district, 1 mi south of Shaftesbury.  The civil parish covers 2600 acres and has an underlying geology of Kimmeridge clay, greensand and gault clay.  In the 2011 census the parish—which includes HM Prison Guys Marsh—had a population of 822.

HM Prison Castington: HM Prison Castington was a male juvenile's prison and Young Offenders Institution, located in the village of Acklington in Northumberland, England.  The prison was operated by Her Majesty's Prison Service.  In 2011 the facility was merged into the newly named HM Prison Northumberland.

Everynight ... Everynight: Everynight ... Everynight is an Australian drama film directed by Alkinos Tsilimidos and released in 1994.  Based on a play of the same name, written by Ray Mooney, the film details the early life of contract killer Christopher Dale Flannery and is set inside Melbourne's HM Prison Pentridge's maximum security "H Division".  Filming was undertaken at HM Prison Geelong.

Liverpool: Liverpool ( ) is a city in North West England, with an estimated population of 478,580 in 2015.  With its surrounding areas, it is the fifth-largest metropolitan area in the UK, with over 2.24 million people in 2011.  The local authority is Liverpool City Council, the most populous local government district within the metropolitan county of Merseyside and the largest within the Liverpool City Region.

HM Prison Altcourse: HM Prison Altcourse is a Category B men's private prison and Young Offenders Institution in the Fazakerley area of Liverpool in Merseyside, England.  The prison is operated by G4S.

HM Prison Oxford: HM Prison Oxford was a prison located in Oxford Castle from 1888 until 1996.  The castle had been used as a prison since the seventeenth century, but it only acquired the name HM Prison Oxford in the 1888 prison reforms.

Supporting paragraphs: HM Prison Altcourse Liverpool
Answer: 478,580