Question: The Onkaparinga River National Park in Onkaparinga Hills, South Australia is in which southern suburb?

Context paragraphs:
Onkaparinga River Recreation Park: Onkaparinga River Recreation Park is a protected area occupying land in the estuary of the Onkaparinga River in South Australia.  The recreation park which was established in 1985 is approximately 32 km from Adelaide city centre.  It is the venue for recreational activities such as walking, canoeing, kayaking, recreational fishing and picnics.

Electoral district of Mawson: Mawson is an electoral district of the House of Assembly in the Australian state of South Australia.  It covers most of the outer southern suburbs of the City of Onkaparinga, including Hackham, Hackham West, Huntfield Heights, Noarlunga Downs, Old Noarlunga, Onkaparinga Hills and Seaford Heights, the regional shopping centre area at Noarlunga Centre, parts of Woodcroft, and the southern wine region around McLaren Vale and Willunga.

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.

City of Onkaparinga: The City of Onkaparinga is a local government area (LGA) located on the southern fringe of Adelaide, South Australia.  It is named after the Onkaparinga River, whose name comes from "Ngangkiparinga", a Kaurna word meaning women's river.  It is the largest LGA in South Australia, with an estimated population of 164,800 people in both urban and rural communities and is also geographically expansive, encompassing an area of 518.3 km².  The council is headquartered in the Noarlunga Centre with area offices situated in Aberfoyle Park, Woodcroft and Willunga.

Onkaparinga Hills, South Australia: Onkaparinga Hills is a southern suburb of Adelaide, in the City of Onkaparinga.  It covers an area of approximately 22 km2 .  It has a population of 2534 people (2011 Census).  It is a leafy suburb that includes parts of the Onkaparinga River National Park.

Electoral district of Onkaparinga: Onkaparinga is a defunct electoral district that elected members to the House of Assembly, the lower house of the bicameral legislature of the Australian state of South Australia.  It was established in 1857, abolished in 1902; re-established in 1938 and abolished again in 1970.  It was named after the Onkaparinga River.

Murray River National Park: Murray River National Park is a protected area in South Australia located between 180 km and 240 km north east of the Adelaide city centre.  The national park was proclaimed in 1972 "to conserve a significant proportion of South Australia’s floodplain environments which are not represented widely in other reserve systems."  The national park consists of three sections adjoining the Murray River and extending from near Loxton in the south west to near Renmark in the north-east.  The first which is known as the ‘Katarapko’ section is located on the north side of the river between Loxton in the south and Berri in the north.  The second section which is known as the ‘Lyrup Flats’ section is located on the north side of the river midway between Berri and Loxton.  The third section is known as the ‘Bulyong’ section is located on the west side of the river upstream from Renmark.  The national park is classified as an IUCN Category VI protected area.

Onkaparinga River National Park: Onkaparinga River National Park is a protected area in the Australian state of South Australia located about 32 km south of Adelaide city centre.  It extends over the floodplain of the Onkaparinga River east of Main South Road.

Clarendon Weir: The Clarendon Weir is a small weir on the Onkaparinga River, near Adelaide in South Australia.  Built in 1894–96 as part of the early Onkaparinga Water Scheme, the weir was designed to pool water from the Mount Bold Reservoir, on the Onkaparinga, which is often boosted with water from the River Murray.  From the weir water is directed onwards to Happy Valley Reservoir in the Field River catchment through pipeline.  The water is used to supply the majority of the Adelaide region's water needs.  The Clarendon Weir wall, originally constructed with large blocks of Macclesfield marble, was raised to its current height of 14.5 m in the mid-1960s.

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.

Supporting paragraphs: Onkaparinga Hills, South Australia Onkaparinga River National Park
Answer: Adelaide