<https://secure.gravatar.com/avatar/204eca4810d6f72dc0fc1da02c7757f0?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://seo-bestpractices.com/content-optimization-2/how-to-write-for-web-pages/>