paragraph_text: The men's 400 metres competition at the 2012 Summer Olympics in London, United Kingdom, was held at the Olympic Stadium on 4–6 August.

paragraph_text: The men's tournament of water polo at the 2012 Summer Olympics at London, Great Britain, began on 29 July and lasted until 12 August 2012. All games were held at the Water Polo Arena.

paragraph_text: In December 2012 Flood was elected captain of Leander Club, the first time a woman had been appointed to this role in almost 200 years. Her predecessor as Captain was Richard Egington, a medallist with the GB men's eight at both the 2008 Summer Olympics and 2012 Summer Olympics.

paragraph_text: The men's 1 mile freestyle was a swimming event held as part of the Swimming at the 1904 Summer Olympics programme. It was the first time the event was held at such a distance at the Olympics and the only time the mile was used; later incarnations of the event used 1500 metres as the distance.

paragraph_text: This is a list of host cities of the Olympic Games, both summer and winter, since the modern Olympics began in 1896. Since then, summer games have usually -- but not always -- celebrated a four - year period known as an Olympiad. There have been 28 Summer Olympic Games held in 23 cities, and 23 Winter Olympic Games held in 20 cities. In addition, three summer and two winter editions of the Games were scheduled to take place but later cancelled due to war: Berlin (summer) in 1916; Tokyo / Helsinki (summer) and Sapporo / Garmisch - Partenkirchen (winter) in 1940; and London (summer) and Cortina d'Ampezzo, Italy (winter) in 1944. The 1906 Summer Olympics were officially sanctioned and held in Athens. However, in 1949, the International Olympic Committee (IOC), decided to unrecognize the 1906 Games. Four cities have been chosen by the IOC to host upcoming Olympic Games: Tokyo for the 2020 Summer Olympics, Beijing for the 2022 Winter Olympics, Paris for the 2024 Summer Olympics, and Los Angeles for the 2028 Summer Olympics.

paragraph_text: He qualified to the men's sabre event of the 2012 Summer Olympics through the zone tournament held in Wakayama City, becoming the first Iranian fencer to compete at the Olympics. He was defeated in the first round by Romania's Florin Zalomir. He also competed in men's sabre event at the 2016 Summer Olympics and reached the semifinals by a series of fine performances against the likes of Andriy Yahodka, Gu Bon-gil and Vincent Anstett but missed the chance to go on the podium when he was defeated by Daryl Homer in the semifinals and Kim Jung-hwan in the Bronze medal match.

paragraph_text: In 2008 Naomi van As became an Olympic Gold medal winner with her national team at the 2008 Summer Olympics in Beijing, scoring the first goal in their 2-0 win over China. At the 2012 Summer Olympics, she was again part of the Dutch team that won gold.

paragraph_text: Bosnia and Herzegovina competed at the 2012 Summer Olympics in London, United Kingdom from 27 July to 12 August 2012. This was the nation's sixth appearance at the Summer Olympics.

paragraph_text: The Underground has its origins in the Metropolitan Railway, the world's first underground railway. Opened in 1863, it is now part of the Circle, Hammersmith & City and Metropolitan lines; the first line to operate underground electric traction trains, the City & South London Railway in 1890, is now part of the Northern line. The network has expanded to 11 lines, and in 2016 -- 17 carried 1.379 billion passengers, making it the world's 11th busiest metro system. The 11 lines collectively handle approximately 4.8 million passengers a day.

paragraph_text: The 2012 Summer Olympics, formally the Games of the XXX Olympiad and commonly known as London 2012, was an international multi-sport event that was held from 27 July to 12 August 2012 in London, United Kingdom. The first event, the group stage in women's football, began on 25 July at the Millennium Stadium in Cardiff, followed by the opening ceremonies on 27 July. 10,768 athletes from 204 National Olympic Committees (NOCs) participated.

paragraph_text: The Youth Olympic Games (YOG) is an international multi-sport event organized by the International Olympic Committee. The games are held every four years in staggered summer and winter events consistent with the current Olympic Games format, though in reverse order with Winter Games held in leap years instead of Summer Games. The first summer version was held in Singapore from 14 to 26 August 2010 while the first winter version was held in Innsbruck, Austria from 13 to 22 January 2012. The age limitation of the athletes is 14 to 18. The idea of such an event was introduced by Johann Rosenzopf from Austria in 1998. On 6 July 2007, International Olympic Committee (IOC) members at the 119th IOC session in Guatemala City approved the creation of a youth version of the Olympic Games, with the intention of sharing the costs of hosting the event between the IOC and the host city, whereas the traveling costs of athletes and coaches were to be paid by the IOC. These Games will also feature cultural exchange programs and opportunities for participants to meet Olympic athletes.

paragraph_text: The heavyweight was the heaviest boxing weight class held as part of the boxing at the 1904 Summer Olympics programme. The competition was held on September 21, 1904 and on September 22, 1904. It was the first time the event, like all other boxing events, was held in Olympic competition.

paragraph_text: The men's 3000 metres team race was a track and field athletics event held as part of the athletics at the 1912 Summer Olympics programme. It was the fourth appearance of a team race style event, though the first to be held at the distance of 3000 metres, which became the standard until the event was eliminated following the 1924 Summer Olympics. The competition was held on Friday, July 12, 1912 and on Saturday, July 13, 1912.

paragraph_text: The flyweight was the lightest boxing weight class held as part of the Boxing at the 1904 Summer Olympics programme. The competition was held on September 22, 1904. It was the first time the event, like all other boxing events, was held in Olympic competition.

paragraph_text: The 2024 Summer Olympics (French: Les Jeux olympiques d'été de 2024), officially known as the Games of the XXXIII Olympiad, and commonly known as Paris 2024, is a forthcoming international multi-sport event which will be hosted in Paris from 2 to 18 August 2024. Having previously hosted the 1900 Summer Olympics and the 1924 Summer Olympics, Paris will become the second city after London (1908, 1948 and 2012) to host the Olympic Games three times. 2024 will also mark the centennial of the 1924 Summer Olympics, which were held in the same city, and was the last time Paris held the Olympic Games.

paragraph_text: The women's modern pentathlon at the 2012 Summer Olympics in London was held on 12 August. Three venues were used: the Copper Box (fencing), Aquatics Centre (swimming) and Greenwich Park (horse-riding and combined running and shooting).

paragraph_text: The men's long jump competition at the 2012 Summer Olympics in London, United Kingdom was held at the Olympic Stadium on 3–4 August.

paragraph_text: This is a list of host cities of the Olympic Games, both summer and winter, since the modern Olympics began in 1896. Since then, summer games have usually -- but not always -- celebrated a four - year period known as an Olympiad. There have been 28 Summer Olympic Games held in 24 cities, and 23 Winter Olympic Games held in 20 cities. In addition, three summer and two winter editions of the Games were scheduled to take place but later cancelled due to war: Berlin (summer) in 1916; Tokyo / Helsinki (summer) and Sapporo / Garmisch - Partenkirchen (winter) in 1940; and London (summer) and Cortina d'Ampezzo, Italy (winter) in 1944. The 1906 Summer Olympics were officially sanctioned and held in Athens. However, in 1949, the International Olympic Committee (IOC), decided to unrecognize the 1906 Games. Four cities have been chosen by the IOC to host upcoming Olympic Games: Tokyo for the 2020 Summer Olympics, Beijing for the 2022 Winter Olympics, Paris for the 2024 Summer Olympics, and Los Angeles for the 2028 Summer Olympics.

paragraph_text: Ramin Azizov (born 8 February 1988, in Lankaran) is an Azerbaijani taekwondo practitioner. He received a gold medal at the 2011 World Taekwondo Olympic Qualification Tournament, held in his home country, and qualified for the 2012 Summer Olympics in the -80 kg division. At the 2012 Summer Olympics he won his first match against Steven López, before losing to Mauro Sarmiento in the quarterfinals.

paragraph_text: Yann Siccardi (born 11 April 1984 in La Colle, Monaco) is a Monégasque Olympic judoka who competes in the Men's 60 kg category. He competed in the 2008 and the 2012 Summer Olympics. At the 2008 Summer Olympics, he lost in the first round to Craig Fallon of Great Britain. At the 2012 Summer Olympics, he was defeated in the third round by Russian Arsen Galstyan. Siccardi won a gold medal in the 60 kg and under category at the 2011 Games of the Small States of Europe. Siccardi qualified for the 2016 Summer Olympics and is the Monégasque flag bearer.

Question: What was the first underground line in the British city holding the summer Olympics in 2012?
Answer: City & South London Railway