<https://charming-lab.com/archives/tag/%e5%b0%88%e6%ab%83%e9%98%b2%e6%9b%ac#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://charming-lab.com/archives/tag/%E5%B0%88%E6%AB%83%E9%98%B2%E6%9B%AC>