<https://twisted-tokyoite.com/2008/08/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ListItem>
<https://twisted-tokyoite.com/2008/08/07/%E3%81%9D%E3%82%8C%E3%81%A7%E3%82%82/>