Task: Question Generation
Input (English): In the early years of the Second World War, aeronautical engineer Barnes Wallis is struggling to develop a means of attacking Germany's dams in the hope of crippling German heavy industry. Working for the Ministry of Aircraft Production, as well as doing his own job at Vickers, he works feverishly to make practical his theory of a bouncing bomb which would skip over the water to avoid protective torpedo nets. When it came into contact with the dam, it would sink before exploding, making it much more destructive. Wallis calculates that the aircraft will have to fly extremely low (150 feet (46Â m)) to enable the bombs to skip over the water correctly, but when he takes his conclusions to the Ministry, he is told that lack of production capacity means they cannot go ahead with his proposals.Angry and frustrated, Wallis secures an interview with Sir Arthur "Bomber" Harris (played by Basil Sydney), the head of RAF Bomber Command, who at first is reluctant to take the idea seriously. Eventually, however, he is convinced and takes the idea to the Prime Minister, who authorises the project.Bomber Command forms a special squadron of Lancaster bombers, 617 Squadron, to be commanded by Wing Commander Guy Gibson, and tasked to fly the mission. He recruits experienced crews, especially those with low-altitude flight experience. While they train for the mission, Wallis continues his development of the bomb but has problems, such as the bomb breaking apart upon hitting the water. This requires the drop altitude to be reduced to 60 feet (18Â m). With only a few weeks to go, he succeeds in fixing the problems and the mission can go ahead.The bombers attack the dams. Eight Lancasters and their crews are lost, but the overall mission succeeds and two dams are breached.
Output (English): What is the name of special squadron of Lancaster bombers?