<https://hash.bg/forum/topic/1399-%D0%B1%D0%BE%D1%80%D1%81%D0%B8-%D0%B7%D0%B0-%D0%BA%D1%80%D0%B8%D0%BF%D1%82%D0%BE%D0%B2%D0%B0%D0%BB%D1%83%D1%82%D0%B8/page/4/#comment-16648>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://hash.bg/forum/topic/1399-%D0%B1%D0%BE%D1%80%D1%81%D0%B8-%D0%B7%D0%B0-%D0%BA%D1%80%D0%B8%D0%BF%D1%82%D0%BE%D0%B2%D0%B0%D0%BB%D1%83%D1%82%D0%B8/page/4/?tab=comments>