<https://unison.twitbitapp.com/%e3%80%90%e3%83%a6%e3%83%8b%e3%82%a8%e3%82%a2%e3%80%91spotlight-%e7%9f%b3%e5%a1%9a%e7%91%b6%e5%ad%a3-34/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://unison.twitbitapp.com/%E3%80%90%E3%83%A6%E3%83%8B%E3%82%A8%E3%82%A2%E3%80%91spotlight-%E7%9F%B3%E5%A1%9A%E7%91%B6%E5%AD%A3-34/>