Question: Sam Willoughby (born 15 August 1991 in Bedford Park, South Australia) is an Australian BMX cyclist also known as 'the BMX bandit', Bedford Park is a southern suburb of where, in South Australia?

full_context: Document 1: Sam Masters: Samuel Peter "Sam" Masters (born 23 May 1991) is an Australian motorcycle speedway rider who won the Premier League Riders' Championship in 2011. Masters is the reigning Australian Champion having won the Championship in January 2017.
Document 2: Sefton Park, South Australia: Sefton Park is a suburb about 6 km north east of the Adelaide CBD, South Australia and lies in both the City of Port Adelaide Enfield and the City of Prospect. It borders the suburbs Enfield, Nailsworth, Prospect and Broadview. Sefton Park is a minor shopping district of Adelaide and is also one of Adelaide's smallest suburbs.
Document 3: Regency Park, South Australia: Regency Park is an inner-northern suburb of Adelaide, 8 km from the City Centre, in the state of South Australia, Australia. It is located in the City of Port Adelaide Enfield, and is adjacent to Wingfield, Angle Park, Ferryden Park, Kilburn, Prospect, Dudley Park and Croydon Park. It is bounded to the north by Grand Junction Road, east by the Gawler train line, south by Regency Road and to the west by Days and South Roads. The postcode for Regency Park is 5010.
Document 4: Westbourne Park, South Australia: Westbourne Park is an inner southern suburb of the State capital of South Australia, Adelaide. The suburb was named after Westbourne, a village in Sussex, England, and was laid out in 1881.
Document 5: Tanya Bailey: Tanya Bailey (born 15 March 1981 in Dampier, Western Australia) is an Australian amateur BMX cyclist. Bailey has been a part of the national BMX cycling team for more than 10 years, but granted her first and only opportunity to represent her nation Australia at the 2008 Summer Olympics, where she became a semifinalist in the women's elite category. In that same year, Bailey has also reached her ample success in the sport, finishing second at the Australian national championships and Supercross World Cup, both were held in Adelaide, South Australia. Throughout her sporting career, Bailey has been training with her personal and assistant national coach Wade Bootes for the Wanneroo BMX Club in Gold Coast, Queensland.
Document 6: Park Holme, South Australia: Park Holme is a southern suburb of Adelaide in the City of Marion, South Australia, home to the Marion Swimming Centre. It is bordered in the east by Marion Road, in the west by Hendrie Street, in the south by Oaklands Road, and in the north by Taranna Ave, just south of Bray Street. It is adjacent to Ascot Park, Edwardstown, South Plympton, Mitchell Park, Clovelly Park, Glengowrie, Morphettville and Oaklands Park. Park Holme
Document 7: Kamakazi (BMX rider): Kamakazi (born Jamie Hildebrandt on 3 August 1981 in Brisbane) is an Australian BMX cyclist who was selected to compete at the 2008 Summer Olympics in Beijing.
Document 8: Rose Park, South Australia: Rose Park is a suburb with a population of 1,293 in the South Australian capital city of Adelaide. It is located one kilometre east of Adelaide's central business district (CBD). Rose Park is a leafy, tree-lined and wealthy inner suburb containing a number of historical and contemporary attractions. Much of the area's 19th Century housing stock has been recognised with heritage protection.
Document 9: Ben Demery: Ben Demery (born 19 September 1986) is an Australian Paralympic tandem cyclist with a vision impairment. He comes from the New South Wales city of Newcastle. His pilot throughout his career has been Shaun Hopkins. He started competitive cycling in December 2005 and won a silver medal in the sprint and a bronze medal in the 1 km time trial at his first international competition, the 2006 IPC Cycling World Championships; that year he was named Lake Macquarie’s Sports Person of the Year. In the next year's UCI Para-cycling Track World Championships, he won silver medals in both the sprint and the 1 km time trial. At the 2008 Beijing Games, he won two silver medals in the Men's Sprint B VI 1–3 and Men's 1 km Time Trial B VI 1–3 events.
Document 10: Somerton Park, South Australia: Somerton Park is a suburb of Adelaide in South Australia. The mainly residential seaside suburb is home to the Somerton Park Beach, and also to Sacred Heart College.
Document 11: Anthony Dean (cyclist): Anthony Dean (born 22 April 1991) is an Australian BMX cyclist. He competed in the men's BMX at the 2016 Summer Olympics.
Document 12: Mitchell Park, South Australia: Mitchell Park is a suburb south of Adelaide. It shares common boundaries with Marion, Bedford Park, Clovelly Park, and Ascot Park. In recent years it has undergone major redevelopments through a program of urban renewal which included the renovation of many properties owned by the former South Australian Housing Trust. These projects have won many awards.
Document 13: Bedford Park, South Australia: Bedford Park is a southern suburb of Adelaide in South Australia.
Document 14: Sam Willoughby: Sam Willoughby (born 15 August 1991 in Bedford Park, South Australia) is an Australian BMX cyclist also known as 'the BMX bandit'. He competed in the men's BMX at the 2012 Summer Olympics, winning a silver medal on 10 August 2012 behind Māris Štrombergs of Latvia.
Document 15: Blake Williams: Blake "Bilko" Williams (born 4 April 1985, in Baxter, Victoria, Australia) is a motorsports competitor who has won championships and X Games medals in several events, including motocross and freestyle motocross. He was awarded the FMX rider of the year in 2009.
ground_truth: Adelaide