Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Stadium | Location | Opened | Built for | Capacity at Construction |
| --- | --- | --- | --- | --- |
| Docklands Stadium | Melbourne, Victoria | 2000.0 | Australian Football League | 53000.0 |
| Football Park | Adelaide, South Australia | 1971.0 | South Australian National Football League | 52000.0 |
| Subiaco Oval | Perth, Western Australia | 1908.0 | Subiaco Football Club | 43500.0 |
| Carrara Stadium | Gold Coast, Queensland | 1986.0 | Brisbane Bears | 25000.0 |
| Kardinia Park | Geelong, Victoria | 1941.0 | Geelong Football Club | 25000.0 |
| Marrara Stadium | Darwin, Northern Territory | 1991.0 | Northern Territory Football League | 15000.0 |
| Linkbelt Oval | Nauru | 1995.0 | Nauru Australian Football Association | 3000.0 |
| Waverley Park | Mulgrave, Victoria | 1959.0 | Victorian Football League | 78000.0 |
| Moorabbin Oval | Moorabbin, Victoria | 1952.0 | St Kilda Football Club | 25000.0 |
Question:
What was the stadium in Adelaide, South Australia built for? 
Answer:
South Australian National Football League