<https://ezoforum.pl/topic/16796-woda-i-ma%C5%82pyz%C5%82o%C5%9Bliwe/#comment-167946>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ezoforum.pl/topic/16796-woda-i-ma%C5%82pyz%C5%82o%C5%9Bliwe/>