<https://www.lokke-furniture.com/post/3\u6708\u3092\u8FCE\u3048\u3066\u3002>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.lokke-furniture.com/post/3%E6%9C%88%E3%82%92%E8%BF%8E%E3%81%88%E3%81%A6%E3%80%82>