Question: In which year the  Australian politician was born who is now a Minister for the South Australian Government?

Context paragraphs:
South Australian Government Gazette: The South Australian Government Gazette is the government gazette of the South Australian Government.

Edward Vardon: Edward Charles Vardon (10 November 1866 – 23 February 1937) was an Australian politician.  Born in Adelaide, South Australia, he was the son of Joseph Vardon, later an Australian Senator.  He was educated at North Adelaide Grammar School before becoming chairman of the family printing company.  From 1910-1912, he served as President of the South Australian Chamber of Manufacturers, and was the Liberal member for Sturt in the South Australian House of Assembly 1918-1921.  On 16 February 1921, he was appointed to the Australian Senate as a Nationalist, filling the casual vacancy caused by the death of Senator Robert Guthrie.  The appointment lapsed due to lack of confirmation by the South Australian Parliament, but he was re-appointed on 9 August.  He contested the 1922 election as a member of the Liberal Party, a group of disaffected Nationalists opposing the leadership of Prime Minister Billy Hughes.  He was defeated, and died in 1937.

Roy Abbott: Roy Kitto Abbott (30 August 1927 – 19 March 2004) was an Australian politician who represented the South Australian House of Assembly seat of Spence from 1975 to 1989 for the Australian Labor Party.  He was Minister of Community Welfare in the Corcoran government in 1979, and Minister of Transport (1982-1985), Minister of Marine (1982-1988), and Minister of Forests, Minister of Lands and Minister of Repatriation (1985-1988) in the Bannon government.

Bob Such: Robert Bruce "Bob" Such (2 June 194411 October 2014) was a South Australian politician.  He was the member for the seat of Fisher in the South Australian House of Assembly from 1989 until his death in 2014.  He defeated Labor MP Philip Tyler at the 1989 election and was a member of the Liberals until 2000 when he became an independent.  Such was Minister for Employment, Training and Further Education, and Minister for Youth Affairs, in the Brown Liberal government from 1993 to 1996.  He served as Speaker of the South Australian House of Assembly for the Mike Rann Labor government from 2005 to 2006.  Such was joint Father of the House with Michael Atkinson from 2012.

Marg Ralston: Marg Ralston is an Australian sports journalist, editor, and government advisor.  She is noted for being the first woman appointed as a sports editor of a major metropolitan paper in Australia.  She is currently a Ministerial Adviser for the South Australian Government, providing recreation and sport advice to Minister Hon. Leon Bignell MP.

Geology of South Australia: South Australia is an Australian state, situated in the southern central part of the country, and featuring some low-lying mountain ranges, the most significant being the Mount Lofty Ranges, which extend into the state's capital city, Adelaide, which comprises most of the state's population.  Adelaide is situated on the eastern shores of Gulf St Vincent, on the Adelaide Plains, north of the Fleurieu Peninsula, between Gulf St Vincent and the low-lying Mount Lofty Ranges.  The state of South Australia, which stretches along the coast of the continent and has boundaries with every other state in Australia, with the exception of the Australian Capital Territory and Tasmania.  The Western Australia border has a history with South Australia, involving the South Australian Government Astronomer, Dodwell and the Western Australian Government Astronomer, Curlewis in the 1920s to mark the border on the ground.

Patrick Conlon (politician): Patrick Frederick "Pat" Conlon (born 1959) is a former South Australian politician who represented the Electoral district of Elder in the South Australian House of Assembly as a member of the Australian Labor Party from 1997 to 2014.  He was Minister for Transport, Minister for Infrastructure, and Minister for Energy, as well as the Leader of Government Business in the Lower House.  Until early 2005, Conlon was also Emergency Services Minister and took part in the Government's response to the Eyre Peninsula bushfire (also known as "Black Tuesday") in January 2005.  Conlon was the most senior Labor Left figure in the Labor cabinet until April 2010 when he became unaligned.

Leon Bignell: Leon William Kennedy Bignell (born 1966), Australian politician, is the member for Mawson representing the South Australian Branch of the Australian Labor Party since the 2006 election.

Ben Rounsevell: William Benjamin Rounsevell (23 September 1843 – 18 July 1923), known as "Ben" or "Big Ben", was a South Australian politician.  He was a member of the South Australian House of Assembly from 1875 to 1893 and from 1899 to 1906, representing the Burra and Burra Burra seats for all but one term, when he held Port Adelaide.  He was Treasurer of South Australia four times: from May to June 1881 under William Morgan, from 1884 to 1885 under John Colton, from January to June 1892 under Thomas Playford II and from 1892 to 1893 under John Downer.  He also served as Commissioner of Public Works from 1890 to 1892 under Playford, and again in the seven-day Solomon Ministry of 1899.  His brother, John Rounsevell, was also a South Australian politician.

Electricity Supply Industry Planning Council: The Electricity Supply Industry Planning Council (ESIPC) was a South Australian government agency responsible for the effective operation of the electricity industry in South Australia.  According to a statement on its website, the agency was established "to provide expert, independent advice to the South Australian Government and the Essential Services Commission of South Australia (ESCOSA) in relation to the state of the electricity supply industry in South Australia."

Supporting paragraphs: Marg Ralston Leon Bignell
Answer: 1966