<https://secure.gravatar.com/avatar/62f5496e879d4a04ff39662d442f997d?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://difundir.org/2019/11/14/34-imagenes-peculiares-no-se-ven-todos-los-dias-11/>