<https://www.marusen-zaidan.or.jp/example/%e7%ac%ac%e4%ba%8c%e5%9b%9e%e5%8f%97%e8%b3%9e%e8%80%85-5#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.marusen-zaidan.or.jp/example/%E7%AC%AC%E4%BA%8C%E5%9B%9E%E5%8F%97%E8%B3%9E%E8%80%85-5>