<https://secure.gravatar.com/avatar/150f3e2b7d16f356d573067e1faf09b7?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.irvinestandard.com/2019/city-life-cycle-reimagined/>