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"Twitter secretly submitted four drafts of its IPO prospectus to regulators before making public the version that drew so much attention yesterday. The changes made in the interim expose concerns about how much advertising Twitter can show its users and whether it can effectively grow outside the United States. The drafts also reveal that Twitter..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/132000/here-are-the-secret-edits-twitter-made-to-its-ipo-filing-hoping-investors-wouldnt-notice/#/h/19356,1,19360,1,19368,1,2>