<https://www.basicthinking.de/blog/2007/06/15/randnotiz-flickr-bruetet-ueber-pornobilder/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.basicthinking.de/blog/2007/06/15/randnotiz-flickr-bruetet-ueber-pornobilder/>