<https://secure.gravatar.com/avatar/6bdd63ee3b65c33b2f1b0936d8454705?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://flamingoseven.com/what-is-rtp-return-to-player-in-gambling/>