<https://www.backdoorsurvival.com/#/schema/person/6f345d6cce584c448c6593b8b2f1da65>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.backdoorsurvival.com/the-knowledge-how-to-rebuild-our-world-from-scratch/>