<https://grdiscovery.com/tag/7%cf%87%cf%81%ce%bf%ce%bd%ce%bf-%ce%ba%ce%bf%cf%81%ce%af%cf%84%cf%83%ce%b9/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://grdiscovery.com/tag/7%CF%87%CF%81%CE%BF%CE%BD%CE%BF-%CE%BA%CE%BF%CF%81%CE%AF%CF%84%CF%83%CE%B9/>