Question: Summertown is a town in the Adelaide Hills region of South Australia, in which country?

Context paragraphs:
Electoral district of Bragg: Bragg is an electoral district of the House of Assembly in the Australian state of South Australia.  The seat of Bragg is named after the eminent physicists Bragg – William Henry and his son, William Lawrence.  The electorate is largely urban and encompasses a significant portion of the City of Burnside, stretching from the east parklands of Adelaide into the Adelaide Hills.  After a redistribution following the 2006 election, the boundary moved eastwards to include suburbs that had formerly been in the seat of Heysen and now borders Kavel.  Bragg currently includes the metropolitan suburbs of Beaumont, Burnside, Dulwich, Erindale, Hazelwood Park, Heathpool, Kensington Park, Leabrook, Linden Park, Rose Park, Marryatville, Skye, St Georges, Stonyfell, Toorak Gardens, Tusmore, Wattle Park and parts of Glen Osmond, and in the hills it includes Crafers, Cleland, Greenhill, Mount Osmond, Piccadilly, Summertown and parts of Ashton, Basket Range, Carey Gully, Horsnell Gully, Leawood Gardens and Uraidla.

Lobethal: Lobethal is a town in the Adelaide Hills area of South Australia.  It is located in the Adelaide Hills Council local government area, and is nestled on the banks of a creek between the hills and up the sides of the valley.  It was once the centre of the Adelaide Hills wool processing industry, which continued until around 1950.  The mill buildings are now used by a number of cottage industry and handcraft businesses.  At the 2006 census, Lobethal had a population of 1,836 which had grown to 1957 by the 2011 census.

Woodside, South Australia: Woodside is a town in the Adelaide Hills region of South Australia.  The town is between Balhannah and Lobethal, 37 km from the state capital, Adelaide.  Amenities include a swimming pool, library, second hand store, grocery store, tennis club, bowls club and playing fields.

Hills Football League: The Hills Football League (HFL) is an Australian rules football league, situated in the Adelaide Hills region of South Australia, to the south east of the state capital Adelaide.

Hahndorf, South Australia: Hahndorf is a small town in the Adelaide Hills region of South Australia.  Currently an important tourism spot, it has previously been a centre for farming and services.  It is accessible from Adelaide, the South Australian capital, via the South Eastern Freeway.  The town was settled by Lutheran migrants largely from in and around a small village then named Kay in Prussia and now known as Kije, Lubusz Voivodeship in Poland.  Many of the settlers arrived aboard the "Zebra" on 28 December 1838.  The town is named after Dirk Meinerts Hahn, the Danish captain of the "Zebra".  It is Australia's oldest surviving German settlement.

Mount Torrens, South Australia: Mount Torrens is a town in the eastern Adelaide Hills region of South Australia, 46 kilometres east-north-east of the state capital, Adelaide and 8 km east of Lobethal along the Onkaparinga River.  It is located in the Adelaide Hills Council local government area.  At the 2006 census, Mount Torrens had a population of 337.

Piccadilly Valley wine sub-region: Piccadilly Valley wine sub-region is a wine sub-region in South Australia located between the town of Summertown in the north and the towns of Stirling and Aldgate to its south in the Mount Lofty Ranges to the east of the Adelaide city centre.  The sub-region received appellation as an Australian Geographical Indication (AGI) on 14 April 2000.  The sub-region is part of the Adelaide Hills wine region and the Mount Lofty Ranges zone.

Summertown, South Australia: Summertown is a town in the Adelaide Hills region of South Australia.  It adjoins Uraidla.  At the 2006 census , Summertown had a population of 392.

Adelaide Hills Hawks SC: The Adelaide Hills Hawks are a soccer club from the Adelaide Hills, South Australia.  Adelaide Hills play in the South Australian State League and are based at The Hawks Nest, Woodside in the Adelaide Hills.  Formed in 1991, the club is still quite young in comparison to other clubs throughout the SA.  The Hawks field sides in the Junior Premier League and have a Junior Academy which has produced several Senior players.

Adelaide Hills: The Adelaide Hills are part of the Mount Lofty Ranges, east of the city of Adelaide in the state of South Australia.  It is unofficially centred on the largest town in the area, Mount Barker, which has a population of around 29,000 and is also one of Australia's fastest growing towns.

Supporting paragraphs: Summertown, South Australia Adelaide Hills
Answer: Australia