<https://blog.labsproject.net/2019/11/ipv6-lab-4-troubleshooting-2-based-on.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.labsproject.net/2019/11/ipv6-lab-4-troubleshooting-2-based-on.html>