<https://blogs.ethz.ch/crowdsourcing/en/#/schema/person/06f1649531094fa10748a91425856237>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blogs.ethz.ch/crowdsourcing/author/d2c9e0138706afa56bbaae31703aabaf/>