<https://secure.gravatar.com/avatar/9c69e8fd04851c8fccd186eba6224688?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.spsn-lbc.cz/vasi-jistotou-je-kvalitni-nosic-kol-na-tazne-zarizeni/>