<https://forums.geocaching.com/GC/index.php?/topic/348778-geocachequalit%C3%A4t/#comment-5722675>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forums.geocaching.com/GC/index.php?/topic/348778-geocachequalit%C3%A4t/&tab=comments#comment-5722420>