<https://sapporo-kobayashi.com/tag/%e3%83%a9%e3%83%bc%e3%83%a1%e3%83%b3-%e4%b9%85-%e6%a5%bd/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sapporo-kobayashi.com/tag/%E3%83%A9%E3%83%BC%E3%83%A1%E3%83%B3-%E4%B9%85-%E6%A5%BD/>