<https://www.idslogic.com/blog/2011/04/keep-your-followers-engaged-to-your-facebook-profile.html#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.idslogic.com/blog/2011/04/keep-your-followers-engaged-to-your-facebook-profile.html>