<https://secure.gravatar.com/avatar/1ee5c12a49906e4e8e16a3be3fea5aa7?s=96&amp;d=mm&amp;r=pg>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.kzsc.org/blog/2018/12/10/at-the-end-of-finals-listen-to-this/>