<https://nagai-k.net/building/%e8%b5%a4%e7%a3%90%e5%b8%82%e9%bb%92%e6%9c%ac/%e9%bb%92%e6%9c%ac-2/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://nagai-k.net/building/%E8%B5%A4%E7%A3%90%E5%B8%82%E9%BB%92%E6%9C%AC/%E9%BB%92%E6%9C%AC-2/>