<https://secure.gravatar.com/avatar/4e2df98b53103c84d886b39874138fa1?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://preguntame.es/como-llenar-un-certificado-de-testigo-de-matrimonio/>