<https://secure.gravatar.com/avatar/13531bb0a30c42a48709af7818a47a72?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.prognost.com/de/2021/02/08/prognost-datacenter/>