<https://daikichi-tosou.com/%e3%81%be%e3%81%9f%e3%81%be%e3%81%9f%e3%80%81%e3%80%81%e3%80%81/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://daikichi-tosou.com/%E3%81%BE%E3%81%9F%E3%81%BE%E3%81%9F%E3%80%81%E3%80%81%E3%80%81/>