<https://secure.gravatar.com/avatar/1a3e8e43826ac23ad6f44d5149ef4e67?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://difundir.org/2020/05/19/16-personas-encontraron-cosas-uno-millon-52/>