<https://blogs.mtu.edu/flex/#/schema/person/5d88d4adce49b0a5c7094c6436ed07f6>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blogs.mtu.edu/flex/2021/09/16/modifications-to-health-and-safety-level-two/>