<https://github.blog/2019-05-23-announcing-github-sponsors-a-new-way-to-contribute-to-open-source/#breadcrumb>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://github.blog/2019-05-23-announcing-github-sponsors-a-new-way-to-contribute-to-open-source/>