<https://secure.gravatar.com/avatar/a9948f9318e2d1cb0fe3dbfef1d1ae29?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://hungrynuggets.com/10-techniques-pour-les-reseaux-sociaux/>