<https://rayscoloredglasses.com/2015/12/28/rays-dirty-dozen-sp-depth-leads-rays-into-2016/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://rayscoloredglasses.com/2015/12/28/rays-dirty-dozen-sp-depth-leads-rays-into-2016/13/>