<http://www.reddit.com/r/webdev/comments/2gypch/is_schemaorg_still_a_thing/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/DiscussionForumPosting>
<https://forum.edugorilla.com/forums/topic/which-of-the-following-plant-roots-are-edible/>