<https://strefaskilla.pl/topic/774-zamkni%C4%99ty-kawa%C5%82-o-jasiu-3/#comment-3727>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://strefaskilla.pl/topic/774-zamkni%C4%99ty-kawa%C5%82-o-jasiu-3/>