<https://secure.gravatar.com/avatar/baa65d5a4d930d4ea4b0004c83344dbe?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://drones-camera.com/th/drone-propeller-wont-stop-spinning/>