<https://secure.gravatar.com/avatar/4a69a2fae763741a9ec605afdf06808e?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.relationshipone.com/blog/quick-tips-lead-nurturing-dos-donts/>