<https://secure.gravatar.com/avatar/a126ade04ead3886e881d46018dd3584?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sharkani.com/google-dokoncil-prechod-na-mobile-first-index/>