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"Welcome to our twenty-first Tumblr Tuesday, where every Tuesday we celebrate our love of Tumblr by interviewing the mastermind behind a new blog. Tumblr, a New York City based startup, ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2012/01/17/tumblr-tuesday-mastergram-applies-instagram-filters-to-iconic-images/>