<https://secure.gravatar.com/avatar/?s=96&d=mm&r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.cryptonomics.news/the-godfather-of-blockchain-alexander-shulgin-on-why-he-is-bullish-on-blockchain-gamification-gaimin-io-2/>