<https://secure.gravatar.com/avatar/44c9b13485354e9ff6afa4b23af5a2b1?s=96&d=mm&r=x>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://gamerwg.org/2010/09/10/gamerwg-podcast-068-duke-nukem-forever/>