Oscar Pistorius

Context: Pistorius competed in T44 (single below-knee amputees) events though he is actually classified in T43 (double below knee amputee). Sometimes referred to as the "Blade Runner" and "the fastest man on no legs", Pistorius took part in the 2004 Summer Paralympics in Athens and came third overall in the T44 (one leg amputated below the knee) 100-metre event. Despite falling in the preliminary round for the 200 metres, he qualified for the final. He went on to win the final in a world record time of 21.97 seconds, beating a pair of American runners both possessing a single amputation, Marlon Shirley and Brian Frasure.  In 2005, Pistorius finished sixth in the non-disabled South African Championships over 400 metres with a world-record time of 47.34 seconds, and at the Paralympic World Cup in the same year, he won gold in the 100 metres and 200 metres, beating his previous 200-metre world record. At the 2006 IPC Athletics World Championships, Pistorius won gold in the 100-, 200- and 400-metre events, breaking the world record over 200 metres. On 17 March 2007, he set a disability sports world record for the 400 metres (46.56 seconds) at the South African Senior Athletics Championships in Durban; and at the Nedbank Championships for the Physically Disabled held in Johannesburg in April 2007, he became the world record holder of the 100- and 200-metre events with times of 10.91 and 21.58 seconds respectively.  Pistorius was invited by the IAAF to take part in what would have been his first international non-disabled event, the 400-metre race at the IAAF Grand Prix in Helsinki, Finland, in July 2005. He was unable to attend, however, because of school commitments. On 13 July 2007, Pistorius ran in the 400-metre race at Rome's Golden Gala and finished second in run B with a time of 46.90 seconds, behind Stefano Braciola who ran 46.72 seconds. This was a warm-up for his appearance at the 400 metres at the Norwich Union British Grand Prix at the Don Valley Stadium in Sheffield on 15 July 2007. As American Olympic champion Jeremy Wariner stumbled at the start of the race and stopped running, Pistorius took seventh place in a field of eight in wet conditions with a time of 47.65 seconds. However, he was later disqualified for running outside his lane. The race was won by American Angelo Taylor with a time of 45.25 seconds. Pistorius had ambitions of competing in other non-disabled events. In particular, he had set his sights on competing at the 2008 Summer Olympics in Beijing, China, but was ultimately not selected by the South African Olympic Committee (see below).  Pistorius has been the subject of criticism because of claims that his artificial limbs give him an advantage over runners with natural ankles and feet. He runs with J-shaped carbon-fibre prosthetics called the "Flex-Foot Cheetah" developed by biomedical engineer Van Phillips and manufactured by Ossur.  On 26 March 2007, the IAAF amended its competition rules to include a ban on the use of "any technical device that incorporates springs, wheels or any other element that provides a user with an advantage over another athlete not using such a device". The IAAF stated that the amendment was not specifically aimed at Pistorius. To decide whether he was running with an unfair advantage, the IAAF monitored his track performances using high-definition cameras to film his race against Italian club runners in Rome on 13 July, and his 400 metres in Sheffield on 15 July 2007, at which he placed last.  In November 2007, Pistorius was invited to take part in a series of scientific tests at the Cologne Sports University under the guidance of Professor of Biomechanics Dr Peter Bruggemann in conjunction with Elio Locatelli, who was responsible with the IAAF of all technical issues. After two days of tests, Bruggemann reported on his findings on behalf of the IAAF. The report claimed that Pistorius's limbs used 25% less energy than runners with complete natural legs to run at the same speed, and that they led to less vertical motion combined with 30% less mechanical work for lifting the body. In December, Bruggemann told Die Welt newspaper that Pistorius "has considerable advantages over athletes without prosthetic limbs who were tested by us. It was more than just a few percentage points. I did not expect it to be so clear." Based on these findings, on 14 January 2008, the IAAF ruled Pistorius's prostheses ineligible for use in competitions conducted under the IAAF rules, including the 2008 Summer Olympics. Pistorius called the decision "premature and highly subjective" and pledged to continue fighting for his dream. His manager Peet van Zyl said his appeal would be based on advice from United States experts who had said that the report "did not take enough variables into consideration".  Pistorius subsequently appealed against the adverse decision to the Court of Arbitration for Sport (CAS) in Lausanne, Switzerland, and appeared before the tribunal at the end of April 2008. After a two-day hearing, on 16 May 2008, the Court of Arbitration for Sport upheld Pistorius's appeal and the IAAF council decision was revoked with immediate effect. The CAS panel unanimously determined that Dr Bruggemann tested Pistorius's biomechanics only at full-speed when he was running in a straight line (unlike a real 400-metre race); that the report did not consider the disadvantages that Pistorius suffers at the start and acceleration phases of the race; and that overall there was no evidence that he had any net advantage over non-disabled athletes. In response to the announcement, Pistorius said: "My focus throughout this appeal has been to ensure that disabled athletes be given the chance to compete and compete fairly with non-disabled athletes. I look forward to continuing my quest to qualify for the Olympics."  In January 2011, a slimmer, trimmer Pistorius won three IPC Athletics World titles in New Zealand but was beaten for the first time in seven years in the 100 metres by American Jerome Singleton. He subsequently won the T44 400 metres in 47.28 seconds and the 100 metres in 11.04 seconds at the BT Paralympic World Cup in May to reassert himself as the world's leading Paralympic sprinter.  Pistorius competed across a number of non-disabled races in the summer of 2011 and posted three times under 46 seconds, but it was at the 19th Internazionale di Atletica Sports Solidarity Meeting in Lignano, Italy, on 19 July that he set a personal best of 45.07 seconds in the 400 metres, attaining the World Championships and Olympic Games "A" standard qualification mark. Pistorius won the 400-metres event with a posted time that ranked him as 15th fastest in the world.  On 8 August 2011 it was announced that he had been included in the South African team for the World Championships in Daegu, South Korea, and had been selected for the 400-metre and the 4 x 400 metre relay squad. In the heats of the 400 metres, Pistorius ran in 45.39 seconds and qualified for the semifinal. However, in the semifinal, he ran 46.19 seconds and was eliminated.  In the heats of the 4 x 400 metres relay, Pistorius ran the opening leg as South Africa advanced to the finals with a national record time of 2 minutes 59.21 seconds. However, he was not selected to run in the finals based on having the slowest split time of 46.20. This caused a controversy, as the first leg is normally Pistorius's slowest since it requires a start from blocks, and he was restricted to the first leg by Athletics South Africa "on safety grounds". He initially tweeted "Haven't been included in final. Pretty gutted.", but later added "Well done to the SA 4x400m team. Was really hard watching, knowing I deserved to be part of it." Pistorius still won the silver medal because he ran in the heats, becoming the first amputee to win a non-disabled world track medal. Reflecting on his World Championship debut, Pistorius said: "I really enjoyed the whole experience. I ran my second fastest time ever in the heats and was really pleased to have reached the semifinals. In the relay I was unbelievably chuffed to have broken the South African record, and hopefully my name will stay on that for a long time to come."  On 4 July 2012, the South African Sports Confederation and Olympic Committee (SASCOC) announced that Pistorius had been included in the Olympic team for the 400-metre and the 4 x 400 metres relay races. CANNOTANSWER

Question: What was the final event Oscar Pistorius won in 2011?
Answer: CANNOTANSWER