<https://www.ngemu.com/threads/this-may-not-possible-but-can-we.1164/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/DiscussionForumPosting>
<https://www.ngemu.com/threads/this-may-not-possible-but-can-we.1164/#post-10259>