<http://thetechbilly.com/billions-of-geotagged-tweets-visualized-in-twitters-amazing-maps/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://thetechbilly.com/billions-of-geotagged-tweets-visualized-in-twitters-amazing-maps/>