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"In July we told you all about, Tweetback, a brand new Twitter initiative founded in Cairo which managed to raise over $200,000 in the space of one week. Tweetback uses social media ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/me/2011/11/17/tweetbacks-back-to-help-develop-100-egyptian-villages/>