<https://acaddesign.ru/video/obshhestvoznanie-7-klass-1-2-nedelya-vveden/#website>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://acaddesign.ru/video/obshhestvoznanie-7-klass-1-2-nedelya-vveden/>