<https://keiko-onuki.com/#website>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://keiko-onuki.com/2018/10/16/%E5%88%9D%E5%BF%83%E8%80%85%E3%81%8C%E3%81%8A%E5%BA%97%E3%81%A7%E3%82%BB%E3%83%83%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%97%E3%81%9F%E3%81%84%E3%80%81%E3%81%AE%E7%B5%90%E6%9E%9C%E3%81%AB%E3%81%AA%E3%82%8B/>