<https://secure.gravatar.com/avatar/4fd52fde44ff7ab230789cbcdae6c17e?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ImageObject>
<https://opster.com/es-errors/registry-miss-match-expected-extendedstatsaggregatorprovider-found/>