<https://en1.link/#website>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://en1.link/2019/09/04/mac%E3%81%AE%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3%E3%82%BD%E3%83%95%E3%83%88%E4%B9%97%E3%82%8A%E6%8F%9B%E3%81%88%E3%81%AE%E5%B7%BB/>