<https://boards.ngccoin.com/topic/390114-rmw-collection-england-and-great-britain-monarchs-halfcrowns/#comment-9532296>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://boards.ngccoin.com/topic/390114-rmw-collection-england-and-great-britain-monarchs-halfcrowns/>