<https://boosty.to/irinasnezhnaya/posts/cbda8c90-a5ee-44ab-bb13-a83e3ddf7471>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://boosty.to/irinasnezhnaya/posts/cbda8c90-a5ee-44ab-bb13-a83e3ddf7471>