<https://www.diprimio.com/#/schema/person/image/>
<http://schema.org/url>
<https://secure.gravatar.com/avatar/1864f558537871b48b26a4bf9cc67852?s=96&d=mm&r=g>
<https://www.diprimio.com/mysql-cheatsheet-per-lamministratore-del-famoso-database/>