question: Walkley Heights, South Australia is located on land that formerly was a prison originally known as what?
answer: The Stockade
context: Title: The Heights Observatory
  Passage: The Heights Observatory (also known as the Adelaide Observatory) is an Astronomical Observatory at The Heights School in Modbury Heights, Adelaide, South Australia.  A group of students known as the STAR Group learns astronomy at an advanced level, both in theory and practice.
  Title: Protected areas of South Australia
  Passage: Protected areas of South Australia consists of protected areas located within South Australia and its immediate onshore waters and which are managed by South Australian Government agencies.  As of June 2016, South Australia contains 353 separate protected areas declared under the "National Parks and Wildlife Act 1972", the "Crown Land Management Act 2009" and the "Wilderness Protection Act 1992" which have a total land area of 19,235,345 ha or 19.6% of the state’s area.
  Title: Electoral district of Playford
  Passage: Playford is an electoral district of the House of Assembly in the Australian state of South Australia.  Named after the long serving South Australian premier Tom Playford, it is a 22.7 km² urban electorate in Adelaide's north, taking in the suburbs of Ingle Farm, Para Hills West and Walkley Heights as well as parts of Gepps Cross, Gulfview Heights, Northfield, Para Hills, Para Vista, Pooraka and Valley View.
  Title: Walkley Heights, South Australia
  Passage: Walkley Heights is a suburb of Adelaide, South Australia.  The suburb is located on land formerly comprising the prison farm for Yatala Labour Prison, and includes fifty-five hectares of land formerly owned by R. M. Williams which was compulsorily acquired during the time of former State Premier Sir Thomas Playford.  The suburb (and one adjacent main road) is named after John Walkley, an early pioneer in South Australia
  Title: Yatala Labour Prison
  Passage: Yatala Labour Prison is a high-security men's prison located in the north-eastern part of the northern suburb Northfield in Adelaide, South Australia, Australia.  It was built in 1854 to enable prisoners to work at the creek, quarrying rock for roads and construction.  Originally known as "The Stockade" it acquired its current name from a local Aboriginal word.
  Title: Adelaide Gaol
  Passage: Adelaide Gaol was an Australian prison located in Thebarton, South Australia, Australia.  The gaol was the first permanent one in South Australia and operated from 1841 until 1988.  The Gaol is one of the two oldest buildings still standing in South Australia, the other being Government House which was built at the same time.  The prison is now a museum, tourist attraction and function centre.
  Title: Dry Creek (South Australia)
  Passage: Dry Creek or Dry Creek Drain ( ) is a seasonal stream in South Australia which passes through the Adelaide suburbs of Modbury, Walkley Heights and Pooraka.  The nearby suburb of Dry Creek and Dry Creek railway station are named after the stream.
citations: Walkley Heights, South Australia Yatala Labour Prison