<https://hubhopper.com/episode/en-episode-1-in-which-we-wonder-about-language-1579633510>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://hubhopper.com/podcast/radio-kaffeehaus-coffee-for-your-ears/148118>