<https://north-field.cc/2017/01/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://north-field.cc/2017/01/04/%E3%80%90%E3%82%BB%E3%83%BC%E3%83%AB%E3%81%A8%E6%96%B0%E4%BD%9C%E3%81%AE%E3%81%94%E6%A1%88%E5%86%85%E3%80%91%E6%98%8E%E3%81%91%E3%81%BE%E3%81%97%E3%81%A6%E3%81%8A%E3%82%81%E3%81%A7%E3%81%A8%E3%81%86/>