<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://nypost.com/2013/05/21/teenagers-flocking-to-twitter-because-too-many-adults-on-facebook-study/NewsArticle>
<http://nypost.com/2013/05/21/teenagers-flocking-to-twitter-because-too-many-adults-on-facebook-study/>