<https://secure.gravatar.com/avatar/f41a3e13093fe734bd67c7b43c5da3b4?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blogs.perficient.com/2019/07/29/googles-martin-splitt-why-google-prefers-responsive-web-design-heres-why/>