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"It was a very merry Christmas for Angry Birds. Rovio Mobile, the company behind the popular games, controlled the two top paid spots in the iOS application store on Christmas day, a ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2010/12/27/christmas-was-angry-birds-biggest-day-ever-with-over-1-million-downloads/>