Question: What man, widely considered to be the greatest sprinter of all time, participated in the 2012 Summer Olympics?

Context paragraphs:
Trinidad and Tobago at the 2012 Summer Olympics: Trinidad and Tobago competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012.  This was Trinidad and Tobago's most successful Summer Olympics.  It was the nation's largest ever delegation sent to the Olympics, with a total of 30 athletes, 21 men and 9 women, in 6 sports.  Trinidad and Tobago's participation in these games marked its sixteenth Olympic appearance as an independent nation, although it had previously competed in four other games (including the 1948 debut in the same host city London) as a British colony, and as part of the West Indies Federation.  The nation was awarded four Olympic medals based on the efforts by the athletes who competed in the track and field.  Javelin thrower Keshorn Walcott became the first Trinidadian athlete to win an Olympic gold medal since the 1976 Summer Olympics in Montreal, where Hasely Crawford won for the sprint event.  Marc Burns, a four-time Olympic athlete and a relay sprinter who led his team by winning the silver medal in Beijing, was the nation's flag bearer at the opening ceremony.

Daniel Bailey: Daniel Everton Bailey (born 9 September 1986) is a male sprinter from Antigua and Barbuda who specialises in the 100 metres.  He carried the flag for his native country at the opening ceremony of the 2004 Summer Olympics, 2012 Summer Olympics, and the 2016 Summer Olympics and was a 100 m semi-finalist at the 2008 Beijing Olympics.

Usain Bolt: Usain St Leo Bolt ( ; born 21 August 1986) is a retired Jamaican sprinter.  He is the first person to hold both the 100 metres and 200 metres world records since fully automatic time became mandatory.  He also holds the world record as a part of the 4 × 100 metres relay.  He is the reigning Olympic champion in these three events.  Because of his dominance and achievements in sprint competition, he is widely considered to be the greatest sprinter of all time.

Annabelle Ali: Annabelle Laure Ali (born 4 March 1985) is a female freestyle wrestler from Cameroon.  She participated in the Women's Freestyle 72 kg event at the 2008 Summer Olympics, where she lost in the 1/8 final to Agnieszka Wieszczek.  At the 2012 Summer Olympics, she lost to Stanka Zlateva in the quarterfinals.  As Zlateva proceeded to the final, Ali was part of the bronze medal repechage, where she lost to Vasilisa Marzaliuk.  At the 2012 Summer Olympics, she was also the Cameroonian flag-bearer at the opening ceremony.

Rodman Teltull: Rodman Teltull (born 29 January 1994 in Koror, Palau) is a Palauan sprinter who competes in the 100 metres.  He was flag bearer for Palau at the 2012 Summer Olympics opening ceremony.  He took part in the 100 metres at the 2012 Summer Olympics in London, but did not progress past the preliminaries, though he set a career-best time of 11.06.

Luke Hall (swimmer): Luke Thomas Michael Hall (born 16 April 1989) is a Swazi swimmer.  He competed at the 2008 Summer Olympics and the 2012 Summer Olympics where he was the flag bearer for his country.  In the 2012 Summer Olympics he came fourth in his heat with the time of 23.48s. His preparation for the Olympics was a very tough process.  Fortunately enough, he was given a wildcard entry into the London 2012 Olympic Games.  After his race, Luke said to the press "My hard work has paid off coming into the Olympics.  But for Swaziland, we need pools like these {Pointing at olympic pool} in order to be able to compete in this event".  This has certainly raised awareness in Swaziland and the government has already decided in putting in 20 m pools in some areas of Swaziland.

List of Salvadorian Olympians: El Salvador first competed in the Olympic Games at the 1968 Summer Olympics in Mexico City, Mexico.  No athletes were sent to the 1976 Summer Olympics, and the nation took part in the boycott of the 1980 Summer Olympics.  Excluding these two Games, El Salvador has participated in every Summer Olympic Games since 1968.  It has never competed in the Olympic Winter Games.  As of the completion of the 2012 Summer Olympics, 118 Salvadorians (93 male and 25 female) have represented their nation at the Olympics.  No Salvadorian has ever won an Olympic medal.

Somalia at the 2012 Summer Olympics: Somalia participated at the 2012 Summer Olympics in London, United Kingdom, which took place from 27 July to 12 August 2012.  The country's participation in London marked its ninth appearance in the Summer Olympics since its debut at the 1972 Summer Olympics.  The delegation included one short-distance sprinter and one long-distance runner: Mohamed Hassan Mohamed and Zamzam Mohamed Farah.  Both qualified for the games through wildcard places from the International Association of Athletics Federations.  Farah was selected as the flag bearer for both the opening and closing ceremonies.  Mohamed and Farah failed to advance beyond the heat stage of their respective events.

Jamaica at the 2012 Summer Olympics: Jamaica competed at the 2012 Summer Olympics in London, from 27 July to 12 August 2012.  This was Jamaica's most successful performance in the Summer Olympics; it was approximately the same size from the previous games with a delegation of 50 athletes (25 men and 25 women), and its athletes broke the nation's record for the number of medals (all awarded in the track and field), won in a single games.  Jamaica's participation in London marked its sixteenth appearance as an independent nation, although it had previously competed in four other games (including the 1948 debut in the same host city London) as a British colony, and as part of the West Indies Federation.  Usain Bolt became the nation's greatest highlight of these games, having won three of Jamaica's four gold medals at London, and breaking an Olympic and world record in two of the three events in which he participated.  Because of his repeated successes for the most medals and records, Bolt became Jamaica's first male flag bearer at the opening ceremony since 1984.

Zsófia Csonka: Zsófia Csonka (born in Pécs on 1983 September 12) is a Hungarian sport-shooter who competed at the 2004, 2008 and 2012 Summer Olympics.  She qualified for the 2012 Summer Olympics for 25 m pistol women at the Munich shooting world cup event.  Her best result came at the 2012 Summer Olympics where she finished 6th in the 25 m pistol event, reaching the final of an event for the first time.

Supporting paragraphs: Jamaica at the 2012 Summer Olympics Usain Bolt
Answer: Usain Bolt