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.

[EX Q]: Context: DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. All these cells, the parent cell and the two new daughter cells, are genetically identical. DNA replication occurs during the S phase (the Synthesis phase) of the cell cycle, before mitosis and cell division. The base pairing rules are crucial for the process of replication. DNA replication occurs when DNA is copied to form an identical molecule of DNA. The general steps involved in DNA replication are as follows: 1. The DNA helix unwinds like a zipper as the bonds between the base pairs are broken. The enzyme DNA Helicase is involved in breaking these bonds. 2. The two single strands of DNA then each serve as a template for a new stand to be created. Using DNA as a template means that on the new strand, the bases are placed in the correct order because of the base pairing rules. Recall that A and T are complementary bases, as are G and C. As a template strand is read, the new strand is created. If ATGCCA is on the "template strand," then TACGGT will be on the new DNA strand. The enzyme DNA Polymerase reads the template and builds the new strand of DNA. 3. The new set of nucleotides then join together to form a new strand of DNA. The process results in two DNA molecules, each with one old strand and one new strand of DNA. This process is known as semiconservative replication because one strand is conserved (kept the same) in each new DNA molecule ( Figure 1.1). DNA replication occurs when the DNA strands unzip, and the original strands of DNA serve as a template for new nucleotides to join and form a new strand. 
 Question: what is the first step in dna replication?
[EX A]: the dna helix unwinds like a zipper.

[EX Q]: Context: Coming off their bye week, the Lions played a Week 5 Black and Blue Division duel at home with the Chicago Bears. In the first quarter, Detroit trailed early as Bears kicker Robbie Gould got a 37-yard field goal. In the second quarter, the Lions continued to trail as QB Kyle Orton completed a 9-yard TD pass to RB Matt Forte and a 12-yard TD pass to WR/KR Devin Hester. In the third quarter, Chicago continued its domination as Forte got a 1-yard TD run, and CB Charles Tillman returned an interception 26 yards for a touchdown. Afterwards, Detroit got its only score of the game as rookie RB Kevin Smith scored on a 12-yard TD run. In the fourth quarter, the Bears sealed the win when Gould nailed a 45-yard field goal. 
 Question: Who threw the only passing touchdown of the game?
[EX A]: kyle orton

[EX Q]: Context: 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 
 Question: Where did the sword appear to be
[EX A]:
from the heavens in london town