<https://secure.gravatar.com/avatar/bc1c3f6e112c3bb2d30131aa011e1b58?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cotneycl.com/the-dangers-of-working-at-high-altitudes/>