<https://piskun.ca/forum/viewtopic.php?t=12f645a3cf19c4e4c66fd2ccc136aa33e9>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://piskun.ca/forum/viewtopic.php?t=12f645a3cf19c4e4c66fd2ccc136aa33e9>