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<http://thenextweb.com/eu/2012/05/18/rovio-to-launch-racing-themed-angry-birds-heikki-webgame-on-june-18/>
<http://thenextweb.com/eu/2012/05/18/rovio-to-launch-racing-themed-angry-birds-heikki-webgame-on-june-18/>