<https://cafekinesi.com/blog/blog-531/8c6642f8-7524-4958-96a0-e64b28dca762/#itempage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://cafekinesi.com/blog/blog-531/8c6642f8-7524-4958-96a0-e64b28dca762/>