<http://www.reddit.com/r/webdev/comments/2gypch/is_schemaorg_still_a_thing/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.edugorilla.com/forums/topic/directions-analyse-the-statements-given-and-choose-an-appropriate-answer-for-the-question-that-foll-8/>