<https://www.pundir.org/2016/05/blog-post_12.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.pundir.org/search/label/%E0%A4%B5%E0%A4%BF%E0%A4%A6%E0%A5%8D%E0%A4%B5%E0%A4%A4%E0%A5%8D%E0%A4%A4%E0%A4%BE>