Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

[EX Q]: Cis-regulatory modules are non-protein-coding regions of DNA essential for the control of gene expression. One class of regulatory modules is embryonic enhancers, which drive gene expression during development as a result of transcription factor protein binding at the enhancer sequences. Recent comparative studies have begun to investigate the evolution of the sequence architecture within enhancers. These analyses are illuminating the way that developmental biologists think about enhancers by revealing their molecular mechanism of function.
[EX A]: Are human enhancers or promoters evolving faster?

[EX Q]: The movie begins in the year 1967 with a pregnant woman being admitted to a hospital, bleeding from the neck. Paramedics think she was attacked by some type of animal. Doctors perform an emergency C-Section, and her baby (a boy) is born alive just as she dies.Thirty years later a young man named Dennis (Kenny Johnson) is riding in a car with an attractive redhead named Racquel (Traci Lords) heading to an underground nightclub (located, oddly, in a slaughterhouse) somewhere in Los Angeles. After addressing the doorman in Russian, Racquel brings the young man into the club. The man is confused and trying to understand the rules of the club. Some of the regulars indifferently push him aside. Saying he needs a drink, the sprinkler suddenly system activates, raining blood down on everyone inside. It is then that he (and the audience) realizes that everyone in the club is a vampire.Dennis desperately tries to get away and winds up at the feet of a menacing figure in a black-leather trenchcoat. The vampires look on this figure with awe, mumbling the words: "it's the Daywalker!" This is our first look at Blade (Wesley Snipes), the vampire killer.Blade pulls out a shotgun and opens fire on the vampires, who instantly burn to ashes when killed. When the gun is knocked out of his hands by Racquel, Blade uses a set of silver stakes to kill Racquel and more vampires, including the disk jockey. Soon all the vamps are either dead or have fled except for one; a heavyset vamp named Quinn (Donal Logue), whom Blade has apparently run into before. Blade pins Quinn to the wall, and then sets him on fire before confronting the last member in the club (the human man from the beginning). Finding no vampire bite marks on Dennis, Blade lets him live and makes his escape as the police arrive.Quinn is extinguished and taken to the local hospital. A morgue technician examines his blood and shows the results to Dr. Karen Jenson (N'Bushe Wright), who finds a number of irregularities, including abnormally developed jaw muscles. As they are discussing the test results, Quinn springs back to life and bites both doctors. Before he can finish Dr. Jenson, Blade shows up and saves her, cutting off one of Quinn's arms.Blade brings Karen to his hideout and asks for help from his mentor, an elderly man named named Whistler (Kris Kristofferson). Whistler injects Dr. Jenson with a solution of garlic essence and silver nitrate and remarks that she has a 50/50 chance of recovering.Meanwhile, a group of vampires are discussing Blade's latest attack on their members. Apparently this club (and to an extent, Quinn) is the property of a vampire named Deacon Frost (Stephen Dorff). Frost wants the vampires to outright rule the humans and use them as a food source while the others (particularly an older vampire named Dragonetti) prefer to maintain a peaceful co-existance. Dragonetti (Udo Kier) in particular does not like Frost because Frost is not a "pure-blood" (ie: was not born a vampire, merely became one through the bite of another). Frost is also arrogant and his & the actions of his followers draw unnecessary attention to the vampire underworld.The next morning, Jenson awakens and sees Whistler injecting Blade with some type of serum. She tries to run away but Whistler confronts her and tells her that he and Blade are hunting vampires. Karen of course is skeptical, but Whistler goes on to talk about what they use to hunt- explaining that vampires are severely allergic to silver & garlic while also being vulnerable to sunlight (ultraviolet rays in particular). Whistler fuels up Blade's car and gives him a new UV flashlight to use when hunting that night. Whistler also gives Karen a type of "vampire mace" (garlic & silver nitrate in a liquid form).Blade drops Karen off at her apartment and she tries to pack up and get out of town. A police officer, identifying himself as Officer Krieger (Kevin Patrick Walls), arrives and questions her about the events
[EX A]: What are the weapons made out of?

[EX Q]: In olden times, England is in turmoil. With the death of the King, noone can decide who is the rightful heir to the throne. With war threatening to tear the country asunder, a stone and anvil appear from the heavens in London town, with a sword planted firmly in the anvil. On the hilt of the sword, read the words, "Whoso pulleth out this sword of this stone and anvil is rightwise king, born of England." Many try to pull the sword, but none can budge it. In time, the sword is forgotten, and the Dark Ages plunge the countryside into a dismal state.Out in the woods one day, Sir Kaye is out hunting with his adopted brother Arthur, whom everyone names 'Wart.' After causing Kaye to miss shooting a deer, Arthur promises to retrieve the arrow. Arthur's journey leads him to a small hut, wherein resides a sorcerer named Merlin, and his pet owl, Archimedes, who can talk. Merlin explains to Arthur that he was expecting him to appear. After they have tea, Merlin decides to accompany Arthur back to his home, and after packing up everything in the hut into a small satchel, the two set off.Arthur and Merlin arrive at the castle of Sir Ector, where Arthur is immediately put to work in the kitchen. Merlin introduces himself to Ector, and displays his powers to the doubting Knight. After some persuasion, Ector allows Merlin to stay, putting him up in the Northwest Tower, a crumbling edifice of the castle.A few days later, Archimedes observes the arrival of Sir Pelinore, who has brought news from London of a jousting tournament to Ector and Kaye. According to the rules, the winner of the tournament will become the new King of England. Ector eagerly begins to have Kaye train, and in his excitement, promises Arthur that if he keeps working hard at his duties, he can become Kaye's squire.Merlin hears of this news, and decides to push Arthur to see his true potential (as Merlin can move into the past and the future, he knows who Arthur will become). While walking outside along the castle's moat, Merlin explains that he can turn into a fish. This idea excites Arthur, and Merline turns them both into fish, to explore the moat. However, a much larger fish soon gives chase to young Arthur, until they both manage to escape.Arthur's tardiness in helping Kaye practice results in him washing dishes. Merlin finds him, and after bewitching the dishes and washing utensils, leads Arthur into the forest, where they both are turned into squirrels by the sorcerer. As Arthur leaps among the trees, he comes across a girl squirrel, who is soon madly infatuated with him. Merlin finds the whole scenario cute, until he is soon found irresistible by another squirrel. Merlin then changes himself and Arthur back to normal. The girl squirrel who was infatuated with Arthur, skitters away, heartbroken.Arthur and Merlin return to the castle, where Ector lectures Merlin for making Arthur shirk his duties. Arthur tries to defend Merlin, but his 'mouthing off' ends causes Ector to declare that Arthur will not become Kaye's squire, and that that honor will belong to another person of the castle, who is named Hobbes.Arthur is dejected at what has happened, but Merlin tries to get him to persevere, and plans to educate Arthur. As he attempts to explain things, Archimedes interjects on Merlin's teaching methods, as Merlin is educating Arthur on things that will not be proven for hundreds of years, and could very well lead people to think of Arthur as a raving lunatic in their current Dark Ages.Exasperated at this lecturing, Merlin turns teaching duties over to Archimedes, while he fiddles with a model plane. Archimedes scoffs at the toy plane, while Merlin attempts to prove that 'man will fly.' His efforts lead to the plane plummeting like a rock to the moat below. Even though the plane's flight was a failure, Arthur tells of how he's often dreamed of soaring like a bird. It is then that Merlin uses his
[EX A]:
What is 12-year-old Arthur commonly called?