<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebSite>
<https://hubslide.com/peter-kerkhof/nachtmerrie-of-droom-over-het-samenspel-van-social-media-en-customer-media-s56d897bc8d070ead0ebfb887.html>