<https://questions.pcsteps.gr/questions/%ce%bb%ce%bf%ce%b3%ce%b1%cf%81%ce%b9%ce%b1%cf%83%ce%bc%cf%8c%cf%82-google/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://questions.pcsteps.gr/questions/%ce%bb%ce%bf%ce%b3%ce%b1%cf%81%ce%b9%ce%b1%cf%83%ce%bc%cf%8c%cf%82-google/>