<https://secure.gravatar.com/avatar/b9e8f0590f0c01c780c3b02f4e18be17?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.athenasecurity.net/rocketbook-video-tutorial-rocketbook-review-2020/>