<https://ghgenius.ca/index.php/forum/ghgenius-questions/87-lng-ci-ng-to-lng-ng-to-cng>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ghgenius.ca/index.php/forum/ghgenius-questions/87-lng-ci-ng-to-lng-ng-to-cng>