<https://secure.gravatar.com/avatar/fd98034a2cd977e21a37bdc0407ba23e?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://kingssmiles.com/what-are-the-other-benefits-of-braces/>