<https://zegarkiclub.pl/forum/topic/40851-oceanusy-%C5%82%C4%85czcie-si%C4%99/page/66/#comment-2672469>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://zegarkiclub.pl/forum/topic/40851-oceanusy-%C5%82%C4%85czcie-si%C4%99/page/66/?tab=comments>