| http://www.w3.org/ns/prov#value | - According to Wikipedia, ???Twitter is a free social networking and micro-blogging service that allows users to send ???updates??? (or ???tweets???; text-based posts, up to 140 characters long) to the Twitter website, via short message service (e.g. on a cell phone), instant messaging, or a third-party application such as Twitterrific or Facebook.
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