Mauritania competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012.
 The country's participation at London marked its eighth appearance in the Summer Olympics since its debut in the 1984 Summer Olympics.
 The delegation included two track and field athletes, Jidou El Moctar and Aicha Fall, who were selected to the team by wildcard places, as the nation had no athletes that met either the "A" or "B" qualifying standards.
 Moctar was selected as flag bearer for the opening ceremony while a LOCOG Games Maker carried it for the closing ceremony.
 Neither of the two athletes progressed beyond the heats.
Great Britain, represented by the British Olympic Association (BOA), competed at the 2004 Summer Olympics in Athens, Greece, from 13 to 29 August 2004.
 The British sent a wide-ranging delegation to the Games, continuing its ubiquitous presence in the Olympic games, the only country to have sent competitors to every summer and winter games since the birth of the modern Olympics in 1896.
 Great Britain's 264 athletes, 161 men and 103 women, competed in 22 disciplines throughout the two-week event.
 The team entered the opening ceremony behind the Union Flag carried by judoka Kate Howey.
 Double gold medal winner Kelly Holmes carried the flag at the closing ceremony.
Dame Kelly Holmes, DBE (born 19 April 1970) is a retired British middle distance athlete.
Chad competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012.
 This marked the nation's eleventh appearance at the Summer Olympics since its debut in the 1964 Summer Olympics.
 The Chadian delegation included track and field athlete Hinikissia Ndikert and judoka Carine Ngarlemdana.
 Ngarlemdana was the flag bearer for the opening ceremony and Ndikert was the flag bearer for the closing ceremony.
 Neither of Chad's athletes progressed beyond the first round of their events.
 Chad was one of only two countries to have a female-only team at the 2012 games.
Dominica participated in the 2012 Summer Olympics in London from 27 July to 12 August 2012.
 The country's participation in London marked its fifth appearance in the Summer Olympics since its debut in the 1996 Summer Olympics.
 The delegation included two athletes: Erison Hurtault and Luan Gabriel, the former qualified for the Games by meeting qualification standards while the latter entered the quadrennial event through a wildcard place.
 Hurtault was selected as the flag bearer for the opening ceremony while Gabriel carried the flag at the closing ceremony.
 Neither athlete progressed farther than the first round of their respective events.
Lesotho competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012.
 The country's participation at London marked its tenth appearance in the Summer Olympics since its début at the 1972 Summer Olympics.
 The delegation included three track and field athletes; Tsepo Ramonene, Mosito Lehata and Mamorallo Tjoka, and one swimmer; Masempe Theko.
 Ramonene and Lehata qualified for the Games by meeting qualification standards, while Tjoka and Theko made the Olympics through wildcard places.
 Tjoka was selected as the flag bearer for the opening ceremony while Lehata held it at the closing ceremony.
 Ramonene finished last in the men's marathon and was revived my medical personnel during the event.
 Lehata did not progress to the semi-finals of the men's 200 metres and Tjoka finished in 90th in the women's marathon.
 Theko finished 73rd (and last) overall in the women's 50 metre freestyle and did not progress to the semi-finals of the event.
Bhutan, a country in Southern Asia, participated in nine Summer Olympic Games between its debut in the 1984 Summer Olympics in Los Angeles, United States and the 2016 Summer Olympics in Rio de Janeiro, Brazil.
 The highest number of Bhutanese athletes participating in a Summer Games is six in both the 1984 Summer Olympics and the 1992 Summer Olympics in Barcelona, Spain.
 Bhutan competed at the Rio Summer Games from 5 to 21 August 2016.
 No Bhutanese athlete has ever won a medal at the Olympics.
 The two athletes who were selected to represent Bhutan at the Rio Games were Karma in the women's individual archery tournament and Kunzang Lenchu in the women's 10 metre air rifle shooting contest.
 Along with the two athletes, the Secretary General of Bhutan's Olympic Committee, and two coaches, the country's delegation was led by the heir presumptive to the Bhutan throne Jigyel Ugyen Wangchuck.
 Karma was selected as the flag bearer for the opening ceremony while Lenchu held it at the closing ceremony.
Saúl Craviotto Rivero (born 3 November 1984) is a Spanish sprint canoer who has been racing since the mid-2000s.
 He has won four Olympic medals: a gold medal in the K-2 500 m with Carlos Pérez at the 2008 Summer Olympics in Beijing, a silver medal in the K-1 200 m event at the 2012 Summer Olympics in London, a gold medal in the K-2 200 m with Cristian Toro at the 2016 Summer Olympics and a bronze medal in the K-1 200 m at the 2016 Summer Olympics in Rio de Janeiro.
 He served as the flag bearer for Spain at the closing ceremony of the 2012 Olympics.
Tuvalu competed at the 2012 Summer Olympics in London, which was held from 27 July to 12 August 2012.
 The country's participation at London marked its second appearance in the Summer Olympics since its debut at the 2008 Summer Olympics.
 The delegation consisted of three competitors: two short-distance runners, Tavevele Noa and Asenate Manoa, and one weightlifter, Tuau Lapua Lapua.
 All three qualified for the games through wildcard places because they did not meet the qualification standards.
 Lapua was the flag bearer for the opening ceremony while Manoa carried it at the closing ceremony.
 Noa and Manoa failed to advance beyond the preliminary rounds of their events although the latter established a new national record for the women's 100 metres, while Lapua placed 12th in the men's featherweight (62 kilogram) weightlifting competition.
Trevor Haynes (born 17 November 1929) is a former long-distance runner.
 He competed in the marathon at the 1964 Summer Olympics representing Northern Rhodesia.
 He carried the Northern Rhodesian flag at the Tokyo Olympics Opening Ceremony, but as Zambia declared its independence on 24 October 1964, Haynes carried the Zambian flag at the Closing Ceremony.

Question: What kind of athlete is the person who carried the flag at the closing ceremony of the 2004 Summer Olympics?
Answer: middle distance athlete