<https://forum.superakwarium.pl/topic/45761-budz%C4%85ce-si%C4%99-%C5%BCycie/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.superakwarium.pl/topic/45761-budz%C4%85ce-si%C4%99-%C5%BCycie/>