<https://www.webempresa.com/university/curso-editor-wordpress-gutenberg-basico/compatibilidad-contenido-con-gutenberg/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.webempresa.com/university/curso-editor-wordpress-gutenberg-basico/compatibilidad-contenido-con-gutenberg/>