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"Zagat Hits 50,000 Friends On Foursquare, Is The Location Service Mainstream Yet?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2010/08/10/zagat-hits-50000-friends-on-foursquare-is-the-location-service-mainstream-yet/>