<https://forums.geocaching.com/GC/index.php?/topic/354334-resolution-for-2020-avoid-cache-pollution/#comment-5804897>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forums.geocaching.com/GC/index.php?/topic/354334-resolution-for-2020-avoid-cache-pollution/>