<https://www.pbod.org/blog/2013/10/03/cheaper-purer-illegal-substances-suggest-global-war-drugs-failing/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.pbod.org/blog/2013/10/03/cheaper-purer-illegal-substances-suggest-global-war-drugs-failing/>