<https://ptc.metacomplex.com/#organization>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ptc.metacomplex.com/%D8%AF%D8%B1%D8%A8%D8%A7%D8%B1%D9%87-%D9%85%D8%A7/%D8%AE%D8%AF%D9%85%D8%A7%D8%AA/>