<https://www.computerweekly.com/microscope/opinion/What-on-earth-is-going-on-at-Proofpoint>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.computerweekly.com/microscope/opinion/What-on-earth-is-going-on-at-Proofpoint>