<https://www.bladesmithsforum.com/index.php?/topic/33332-silver-and-walnut/#comment-323501>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.bladesmithsforum.com/index.php?/topic/33332-silver-and-walnut/&tab=comments#comment-323509>