<https://www.divefamilyyellow.com/post/2015/12/12/\u6771\u4F0A\u8C46\u306F\u30AF\u30ED\u30FC\u30BA\uFF08\u6D99\uFF09>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.divefamilyyellow.com/post/2015/12/12/%E6%9D%B1%E4%BC%8A%E8%B1%86%E3%81%AF%E3%82%AF%E3%83%AD%E3%83%BC%E3%82%BA%EF%BC%88%E6%B6%99%EF%BC%89>