Question: The Australian Electoral Division in South Australia, includes what semi-rural suburb of Adelaide, South Australia?

Context paragraphs:
Australian Electoral Commission: The Australian Electoral Commission (AEC) is the federal independent agency in charge of organising, conducting and supervising federal elections and referendums.  State and local government elections are overseen by separate Electoral Commissions in each state and territory: New South Wales elections are conducted by the New South Wales Electoral Commission, in Queensland it is the Electoral Commission of Queensland; in Victoria it is the Victorian Electoral Commission; in South Australia it is the Electoral Commission of South Australia; in Tasmania it is the Tasmanian Electoral Commission; in Western Australia it is the Western Australian Electoral Commission; in the Northern Territory it is the Northern Territory Electoral Commission and in the Australian Capital Territory it is the Australian Capital Territory Electoral Commission.

Division of Adelaide: The Division of Adelaide is an Australian electoral division in South Australia and is named for the city of Adelaide, South Australia's capital.  The 76 km² seat is centred on the Adelaide city centre and spans from Grand Junction Road in the north to Cross Road in the south and from Portrush Road in the east to South Road in the west, taking in suburbs including Ashford, Clarence Park, Enfield, Goodwood, Kent Town, Keswick, Kilburn, Maylands, Northgate, Norwood, Parkside, Prospect, Rose Park, St Peters, Toorak Gardens, Unley and Walkerville.

Division of Hindmarsh: The Division of Hindmarsh is an Australian Electoral Division in South Australia covering the western suburbs of Adelaide.  The division was one of the seven established when the former Division of South Australia was split on 2 October 1903, and was first contested at the 1903 election, though on vastly different boundaries.  The Division is named after Sir John Hindmarsh, who was Governor of South Australia 1836-38.  The 78 km² seat extends from the coast in the west to South Road in the east, covering the suburbs of Ascot Park, Brooklyn Park, Edwardstown, Fulham, Glenelg, Grange, Henley Beach, Kidman Park, Kurralta Park, Morphettville, Plympton, Richmond, Semaphore Park, Torrensville, West Beach and West Lakes.  The international Adelaide Airport is centrally located in the electorate making noise pollution a prominent local issue, besides the aged care needs of the relatively elderly population − the seat has one of the highest proportions of citizens over the age of 65 in Australia.  Progressive boundary redistributions over many decades transformed Hindmarsh from a safe Labor seat in to a marginal seat often won by the government of the day.

Ironbank, South Australia: Ironbank is a semi-rural suburb of Adelaide, South Australia.  It is in the City of Onkaparinga and Adelaide Hills Council local government areas.  At the 2006 census, Ironbank had a population of 523.

Division of Grey: The Division of Grey is an Australian electoral division in South Australia.  The division was one of the seven established when the former Division of South Australia was redistributed on 2 October 1903 and is named for Sir George Grey, who was Governor of South Australia from 1841–45 (and later Prime Minister of New Zealand).

Division of Mayo: The Division of Mayo is an Australian electoral division located to the east, south, south-east and south-west of Adelaide, South Australia.  Established in the South Australian redistribution of 3 September 1984, the division is named after Helen Mayo, a social activist and the first woman elected to an Australian University Council.  The 9,315 km² seat covers an area from Springton in the North to Goolwa in the South.  It takes in the Adelaide Hills, Fleurieu Peninsula and Kangaroo Island, including the towns of Bridgewater, Crafers, Echunga, Gumeracha, Hahndorf, Kingscote, Langhorne Creek, Lobethal, Macclesfield, Mount Barker, Myponga, Oakbank, Stirling, Strathalbyn, Victor Harbor, Woodside, Yankalilla, and part of Birdwood.

Division of Kingston: The Division of Kingston is an Australian Electoral Division in South Australia covering the outer southern suburbs of Adelaide.  The 171 km² seat stretches from Hallett Cove and O'Halloran Hill in the north to Sellicks Beach in the south, including the suburbs of Aldinga Beach, Christie Downs, Christies Beach, Hackham, Hallett Cove, Huntfield Heights, Lonsdale, Maslin Beach, Moana, Morphett Vale, Old Noarlunga, Onkaparinga Hills, Port Noarlunga, Reynella, Seaford, Sellicks Beach, Sheidow Park, Port Willunga, Trott Park, Woodcroft, and parts of Happy Valley and McLaren Flat.

Port Willunga, South Australia: Port Willunga is a semi-rural suburb of Adelaide, South Australia.  It lies within the City of Onkaparinga and has postcode 5173.

Division of South Australia: The Division of South Australia was an Australian Electoral Division covering South Australia.  The seven-member statewide seat existed from the inaugural 1901 election until the 1903 election.  Each elector cast seven votes.  Unlike most of the other states, South Australia had not been split into individual single-member electorates.  The other exception was the five-member Division of Tasmania.  The statewide seats were abolished at a redistribution conducted two months prior to the 1903 election and were subsequently replaced with single-member divisions, one per displaced member, with each elector now casting a single vote.

Division of Barker: The Division of Barker is an Australian Electoral Division in the south-east of South Australia.  The division was established on 2 October 1903, when South Australia's original single multi-member division was split into seven single-member divisions.  It is named for Collet Barker, an early explorer of the region at the mouth of the Murray River.  The 63,886 km² seat currently stretches from Morgan in the north to Port MacDonnell in the south, taking in the Murray Mallee, the Riverland, the Murraylands and most of the Barossa Valley, and includes the towns of Barmera, Berri, Bordertown, Coonawarra, Keith, Kingston SE, Loxton, Lucindale, Mannum, Millicent, Mount Gambier, Murray Bridge, Naracoorte, Penola, Renmark, Robe, Tailem Bend, Waikerie, and parts of Nuriootpa and Tanunda.

Supporting paragraphs: Division of Kingston Port Willunga, South Australia
Answer: Port Willunga