(1) There is a government research group known as the Defense Advanced Research Projects Agency, or DARPA. (2) In 2011 DARPA sponsored a competition known as the "Shredder Challenge." (3) Nearly 9,000 teams participated in the competition, which required the teams to re-create a number of documents that had been shredded, or torn into thousands of tiny pieces. (4) According to the rules of the competition, a $50,000 prize would be granted to the first team to solve five puzzles embedded in the documents. (5) It took the winning team-a group of three computer programmers-600 hours and a complex computer algorithm, but they completed this step. (6) Once the documents had been reconstructed, the next task was comparatively easy: they solved the puzzles within the allotted time frame. (7) In fact, the team even finished early, with two days to spare. (8) Dan Kaufman, director, DARPA Information Innovation Office, praised the team: "Lots of experts were skeptical that a solution could be produced at all, let alone within the short time frame." (9) The Shredder Challenge was organized, in part, to identify vulnerabilities to sensitive information that is protected by shredding practices throughout the US national security community. (10) Past DARPA competitions have focused on such topics as the dissemination of information via social media networks and the development of driverless vehicles. Question Where would the following sentence best be placed? The first step was to put the shredded papers back together. O Before sentence 3 Before sentence 4 O Before sentence 5 Before sentence 6 ​
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