<https://piko12.com/#organization>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://piko12.com/2018/12/21/%E3%83%90%E3%83%BC%E3%82%AC%E3%83%B3%E3%83%87%E3%82%A3%E3%81%AE%E8%8A%B1%E6%9F%84%E3%83%89%E3%83%AC%E3%82%B9/>