<https://secure.gravatar.com/avatar/adbe2e08989861c74d7f7b612c17ff3e?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://photographyfocus.co/how-to-put-a-camera-on-a-tripod/>