input: Zizka helped develop tactics of using wagon forts, called vozova hradba in Czech or Wagenburg by the Germans, as mobile fortifications. When the Hussite army faced a numerically superior opponent they prepared carts for the battle by forming them into squares or circles. The carts were joined wheel to wheel by chains and positioned aslant, with their corners attached to each other, so that horses could be harnessed to them quickly, if necessary. In front of this wall of carts a ditch was dug by camp followers. The crew of each cart consisted of 16-22 soldiers: 4-8 crossbowmen, 2 handgunners, 6-8 soldiers equipped with pikes or flails (the flail was the Hussite "national weapon"), 2 shield carriers and 2 drivers.  The Hussites' battle consisted of two stages, the first defensive, the second an offensive counterattack. In the first stage the army placed the carts near the enemy army and by means of artillery fire provoked the enemy into battle. The artillery would usually inflict heavy casualties at close range.  In order to avoid more losses, the enemy knights finally attacked. Then the infantry hidden behind the carts used firearms and crossbows to ward off the attack, weakening the enemy. The shooters aimed first at the horses, depriving the cavalry of its main advantage. Many of the knights died as their horses were shot and they fell.  As soon as the enemy's morale was lowered, the second stage, an offensive counterattack, began. The infantry and the cavalry burst out from behind the carts striking violently at the enemy, mostly from the flanks. While fighting on the flanks and being shelled from the carts the enemy was not able to put up much resistance. They were forced to withdraw, leaving behind dismounted knights in heavy armor who were unable to escape the battlefield. The enemy armies suffered heavy losses and the Hussites soon had the reputation of not taking captives.

Answer this question "What happened after that?"
output: 

input: On September 8, 2004, Rather reported on 60 Minutes Wednesday that a series of memos critical of President George W. Bush's Texas Air National Guard service record had been discovered in the personal files of Lt. Bush's former commanding officer, Lt. Col. Jerry B. Killian. Once copies of the documents were made available on the Internet, their authenticity was quickly called into question. Much of this was based on the fact that the documents were proportionally printed and displayed using other modern typographic conventions usually unavailable on military typewriters of the 1970s. The font used on the documents has characteristics that exactly match standard font features of Microsoft Word. This led to claims that the memos were forgeries. The accusations then spread over the following days into mainstream media outlets including The Washington Post, The New York Times, and the Chicago Sun-Times.  Rather and CBS initially defended the story, insisting that the documents had been authenticated by experts. CBS was contradicted by some of the experts it originally cited, and later reported that its source for the documents - former Texas Army National Guard officer Lt. Col. Bill Burkett - had misled the network about how he had obtained them.  On September 20, CBS retracted the story. Rather stated, "If I knew then what I know now, I would not have gone ahead with the story as it was aired, and I certainly would not have used the documents in question." The controversy has been referred to by some as "Memogate" and "Rathergate."  Following an investigation commissioned by CBS, CBS fired story producer Mary Mapes and asked three other producers connected with the story to resign. Many believe Rather's retirement was hastened by this incident. On September 20, 2007, Rather was interviewed on Larry King Live commenting "Nobody has proved that they were fraudulent, much less a forgery. ... The truth of this story stands up to this day."

Answer this question "Were the Killian documents controversial?"
output: Much of this was based on the fact that the documents were proportionally printed and displayed using other modern typographic conventions usually unavailable on military typewriters of the 1970s.

input: After leaving the Navy, Attenborough took a position editing children's science textbooks for a publishing company. He soon became disillusioned with the work and in 1950 applied for a job as a radio talk producer with the BBC. Although he was rejected for this job, his CV later attracted the interest of Mary Adams, head of the Talks (factual broadcasting) department of the BBC's fledgling television service.  Attenborough, like most Britons at that time, did not own a television, and he had seen only one programme in his life. However, he accepted Adams' offer of a three-month training course, and in 1952 he joined the BBC full-time. Initially discouraged from appearing on camera because Adams thought his teeth were too big, he became a producer for the Talks department, which handled all non-fiction broadcasts. His early projects included the quiz show Animal, Vegetable, Mineral? and Song Hunter, a series about folk music presented by Alan Lomax.  Attenborough's association with natural history programmes began when he produced and presented the three-part series Animal Patterns. The studio-bound programme featured animals from London Zoo, with the naturalist Julian Huxley discussing their use of camouflage, aposematism and courtship displays. Through this programme, Attenborough met Jack Lester, the curator of the zoo's reptile house, and they decided to make a series about an animal-collecting expedition. The result was Zoo Quest, first broadcast in 1954, where Attenborough became the presenter at short notice due to Lester being taken ill.  In 1957, the BBC Natural History Unit was formally established in Bristol. Attenborough was asked to join it, but declined, not wishing to move from London where he and his young family were settled. Instead, he formed his own department, the Travel and Exploration Unit, which allowed him to continue to front Zoo Quest as well as produce other documentaries, notably the Travellers' Tales and Adventure series.  In the early 1960s, Attenborough resigned from the permanent staff of the BBC to study for a postgraduate degree in social anthropology at the London School of Economics, interweaving his study with further filming. However, he accepted an invitation to return to the BBC as controller of BBC Two before he could finish the degree.

Answer this question "What kind of work did he first do at BBC?"
output:
he became a producer for the Talks department,