<https://secure.gravatar.com/avatar/09b1dce2171d379ae47a3e3f3b55fee5?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://pestcontrolweekly.com/how-to-stop-pigeons-sitting-on-window-ledge/>