Question: What country is the competitive swimmer from who competed three times in the sporting event overseen by the Commonwealth Games Federation?

Context articles: Commonwealth Games Federation
Ben Treffers
2014 Commonwealth Games
Sarah Hardcastle
Aimee Willmott
Siobhan-Marie O'Connor
Commonwealth Games
Lauren Boyle
Kate Haywood
Robert Renwick

Due to the success of the first 1930 British Empire Games in Hamilton, Canada, a meeting of representatives from Great Britain, its colonies and territories decided that the games, similar to the Olympic Games should be held every four years, and that an authoritative organisation should be formed.
 Following the 1932 Summer Olympics, it was decided to form the ""British Empire Games Federation"" who would be responsible for the organising of the games.
 The name of the federation was changed in 1952 to the ""British Empire and Commonwealth Games Federation"", and again in Jamaica in 1966 to the ""British Commonwealth Games Federation"", until eventually being changed again in Christchurch, New Zealand in 1974 to the ""Commonwealth Games Federation"".
Benjamin Treffers (born 15 August 1991) is an Australian competitive swimmer who has participated in the FINA world championships and Commonwealth Games.
 Treffers is the current Commonwealth Champion, Australian Champion and Australian Record Holder in the 50m backstroke event Treffers also won the title of 2012 Australian Champion in the 50m backstroke event and is trained by the Australian Institute of Sport.
 Coached by John Fowlie, Treffers won the title of 2011 Australian Champion in the Men's 100m Backstroke event and represented Australia at the 2011 World Championships in Shanghai, having narrowly missed out on a place at the 2010 Commonwealth Games.
The 2014 Commonwealth Games (Scottish Gaelic: "Geamannan a 'Cho-fhlaitheis 2014" ), officially known as the XX Commonwealth Games and commonly known as Glasgow 2014, (Scottish Gaelic: "Glaschu 2014" ), was an international multi-sport event celebrated in the tradition of the Commonwealth Games as governed by the Commonwealth Games Federation (CGF).
 It took place in Glasgow, Scotland, from 23 July to 3 August 2014.
Sarah Lucy Hardcastle (born 9 April 1969), also known by her married name Sarah Thomas, is a British former competitive swimmer who represented Great Britain in the Olympics, world championships and European championships, and swam for England in the Commonwealth Games.
 She specialised in the 400- and 800-metre freestyle, and also competed in medley races.
 Hardcastle won multiple major championship medals over the course of her career, including individual silver and bronze medals at the 1984 Summer Olympics at the age of 15 and two individual gold medals at the 1986 Commonwealth Games.
 She retired from the sport in 1986 but returned in 1993, winning gold at the World Short Course Championships for the 800-metre freestyle in 1995 and reaching the final of the same event at the 1996 Summer Olympics.
Aimee Willmott (born 26 February 1993) is an English competitive swimmer who has represented Great Britain at the Olympic Games, FINA world championships and European championships, and England in the Commonwealth Games.
 She competed at the 2012 Summer Olympics in the 400 metre individual medley, but did not reach the final.
 She competed in the 2010 Commonwealth Games in Delhi and 2014 games in Glasgow where she won silver medals in the 400 metre individual medley and 200 metres butterfly.
Siobhan-Marie O'Connor (born 29 November 1995) is an English competitive swimmer who has represented Great Britain at the Olympic Games, the FINA World Aquatics Championships and the LEN European Aquatics Championships, and England at the Commonwealth Games.
 A specialist in the 200 metres individual medley, she is the 2014 Commonwealth Games champion in the event, and has won silver medals in the same event at the 2016 Summer Olympics, the 2015 World Aquatics Championships, 2016 European Aquatics Championships, the 2014 World Short-Course Championships and the 2013 and 2015 European Short Course Championships - on each occasion behind World and Olympic champion Katinka Hosszú.
 With six Commonwealth Games medals in total from 2014, O'Connor was England's most decorated athlete at those Games.
The games are overseen by the Commonwealth Games Federation (CGF), which also controls the sporting programme and selects the host cities.
 The games movement consists of international sports federations (IFs),  (CGAs), and organising committees for each specific Commonwealth Games.
 There are several rituals and symbols, such as the Commonwealth Games flag and Queen's Baton, as well as the opening and closing ceremonies.
 Over 5,000 athletes compete at the Commonwealth Games in more than 15 different sports and more than 250 events.
 The first, second, and third-place finishers in each event receive Commonwealth Games medals: gold, silver, and bronze, respectively.
 Apart from many Olympic sports, the games also include some sports that are played predominantly in Commonwealth countries, such as lawn bowls and netball.
Lauren Marie Boyle (born 14 December 1987) is a former competitive swimmer from New Zealand.
 She has competed at three Commonwealth Games and two Olympic Games.
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Kate Emma Haywood (born 1 April 1987) is an English former elite swimmer who competed for Great Britain in the Olympics, FINA world championships, and European championships, and represented England in the Commonwealth Games.
 She competed predominantly as a breaststroke swimmer.
 She was the youngest swimmer to represent England in the Commonwealth Games when she qualified for the 2002 Commonwealth Games in Manchester, where she won a bronze medal in the 4×100-metre medley relay.
 She retired from competitive swimming following the 2012 Summer Olympics.
Robert Peter Renwick (born 21 July 1988) is a Scottish former competitive swimmer who represented Great Britain at the Olympics and FINA world championships, as well as Scotland in the Commonwealth Games.
 Renwick is a world champion and a Commonwealth Games gold medallist.
 He first rose to prominence by swimming the anchor leg in the Scottish men's 4×200-metre freestyle relay team at the 2006 Commonwealth Games as a 17-year-old.
 The team won silver, after he was narrowly touched out by the English relay team.
 Renwick featured in every major Olympic or world championship for Britain from 2007 to 2016.