Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Q: Context: One of the primary criticismes of vestibular schwannoma (VS) radiosurgery is that the risk of surgical morbidity is increased for patients whose tumor progresses after the procedures. We reviewed the French experience of operated patients after failed Gamma Knife radiosurgery. From July 1992 to January 2002, 25 out of the 1000 treated patients underwent another treatment procedure for a gamma knife failure. Excluding the NF2 patients, 21 patients have been operated and the present study shows the data collected for 20 of them. In order to analyze the difficulties observed during the surgery, a questionnaire was filled by the surgeons. The mean interval between radiosurgery and removal was 36 Months, from 10 to 83 Months. The mean increase in Volume was 559% (37 to 3036%, median 160%). Evolution of the Koos grading was found from 8 grade II, 10 grade III et 2 grade IV to 10 grade III and 10 grade IV. Patients have been operated for radiological tumor growth in 7 cases and for clinico-radiological evolution in 13 cases. In 9 cases, the surgeon considered that he had to face unusual difficulties mainly because of adhesion of the tumor to neurovascular structures. Tumor removal was total in 14 cases, near total in 4 cases and subtotal in 2 cases. One case of venous infarction was noticed at the second day following surgery responsible of hemiparesis and aphasia that gradually recovered. At last follow-up examination, facial nerve was normal (House and Brackmann grade I and II) in 10 cases while it was a grade III in 7 cases and grade IV and V in 3 cases. We recommend that the decision for surgical removal of growing vestibular schwannoma after Gamma Knife treatment should be done after a sufficiently long follow-up period. Our results show that the quality of removal and of facial nerve preservation might be impaired by radiosurgery in half of cases. However these results do not support a change in our policy of radiosurgical treatment of small to medium size vestibular schwannoma. 
 Question: Which disease can be categorized using the Koos grading system?

A: vestibular schwannoma
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Q: Context: The movie is based on the true story of two British athletes competing in the 1924 Summer Olympics in Paris. Englishman Harold Abrahams (Ben Cross), who is Jewish, overcomes anti-Semitism and class prejudice in order to compete against the "Flying Scotsman", Eric Liddell (Ian Charleson), in the 100 metre race.Opening in 1919 England, Harold Abrahams enters Cambridge University, where he meets with anti-Semitism from the staff, but enjoys participating in the Gilbert and Sullivan theatre club. He becomes the first person to ever complete the Trinity Great Court run: running around the court in the time it takes for the clock to strike 12. Abrahams achieves an undefeated string of victories in various national running competitions. Although focused on his running, he falls in love with a famous Gilbert and Sullivan soprano, Sybil (Alice Krige).Meanwhile in Scotland, Eric Liddell (Ian Charleson), born in China of Scottish missionary parents, is in Scotland. His devout sister Jennie (Cheryl Campbell) disapproves of Liddell's plans to pursue competitive running. But Liddell sees running as a way of glorifying God before returning to China to work as a missionary.Abrahams and Liddell meet for the first time in London in June 1923 when they first race against each other in a British open. Liddell beats Abrahams who takes it extremely badly. But Sam Mussabini (Ian Holm), a professional trainer whom Abrahams had approached earlier, offers to take him on to improve his technique. This attracts criticism from the Cambridge college masters (John Gielgud and Lindsay Anderson). In their meeting with Abrahams, the Cambridge masters allege it is ungentlemanly for an amateur to "play the tradesman" by employing a professional coach. Abrahams realizes this is a cover for their anti-Semitism and class entitlement, and dismisses their concern.Meanwhile, when Liddell accidentally misses a church prayer meeting because of his running, his sister Jennie upbraids him and accuses him of no longer caring about God. But Eric tells her that though he intends to eventually return to the China mission, he feels divinely inspired when running, and that not to run would be to dishonor God: "I believe that God made me for a purpose. But He also made me fast, and when I run, I feel His pleasure."The two athletes, after over a year of training and racing, are accepted to represent Great Britain in the 1924 Summer Olympics in Paris, France. Also accepted are Abrahams' Cambridge buddies, Lord Andrew Lindsay (Nigel Havers), Aubrey Montague (Nicholas Farrell), and Henry Stallard (Daniel Gerroll) whom join the UK team.While boarding the boat to Paris for the Olympics, Liddell learns from the newspapers that the event for his 100 meter race will be on a Sunday. Liddell refuses to run the race despite strong pressure from the Prince of Wales (David Yelland) as well as the head of the British Olympic committee, Lord Cadogan (Patrick Magee) because Liddell's Christian convictions prevent him from running on the Christian Sabbath (Sunday).Hope appears in the form of Liddell's teammate Lord Andrew Lindsay. Having already won a silver medal in the 400 meter hurdles, Lindsay proposes to yield his place in the 400 meter race on the following Tuesday to Liddell. Liddell gratefully agrees. His religious convictions in the face of national athletic pride make headlines around the world.Liddell delivers a sermon at the Paris Church of Scotland that Sunday, and quotes from Isaiah 40, verse 31:"But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and be not weary; and they shall walk, and not faint."Meanwhile, Abrahams is badly beaten by the heavily favored and more experienced United States runner Charles Paddock (Dennis Christopher) in the 200 meter race who wins the gold medal, while Abrahams takes a second place silver medal. Abrahams knows that his last chance for a gold medal will be the 100 meter run. He competes in the 100 meter sprint and wins, beating Paddock and the rest of the Americans.On Tuesday, just before Liddell's race, the American coach remarks to his runners that Liddell has little chance 
 Question: Who was trainer?

A: mussabini
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Q: Context: The London 20120lympics are being praised as a sporting and logistical success,but the influence on economy is far less certain.Some London tourist attractions,businesses and hotels reported that their business actually fell during the Games.But as Olly Barratt reports from London,the overall UK economy is looking for long-term results. Showing an Olympic-sized party like this cost the UK almost l 5 billion dollars.But while spectators went to east London'S Olympic Park,central London has been much quieter than. normal. Arthur lRason,a central London stallholder,said,"Am I taking less? Yeah,I'm taking less.There'S no question about it." Restaurants were among businesses that reported lower takings than normal at this time of year.And one tourism trade association says a survey of its members found the Games had had a negative influence all over the UK.But during the recent recession ,British officials still insist the Games were worth it.Boris Johnson,Mayor of London said,"I think it'S been an amazing display of what you can do if you plan and you work for years and years on a project. And I think it's a great advertisement for British engineering and British industry." The government hopes the Games will be a great help to the British brand worldwide,and they are also an opportunity to sweet-talk potential investors from all over the world.And a fall in takings for some attractions should not have come as a surprise. 
 Question: Where is the London'S Olympic Park located?

A:
east london.
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