<https://secure.gravatar.com/avatar/a29fe0611d592ca5a49681fba5bd9832?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://netweeks.com/2019/07/indie-artists-wont-able-upload-music-spotify-directly/>