<http://www.energiacentrum.com/#/schema/person/image/>
<http://schema.org/contentUrl>
<http://0.gravatar.com/avatar/ff304eaaf86222365b2d7ceb3389b0da?s=96&d=mm&r=g>
<http://www.energiacentrum.com/know-your-level-with-these-new-tools/>