<https://hubhopper.com/episode/17-part-1-why-were-so-fat-and-planet-fitness-1581434477>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://hubhopper.com/episode/17-part-1-why-were-so-fat-and-planet-fitness-1581434477>