<https://vef-eco.com/%e3%83%8b%e3%83%a5%e3%83%bc%e3%82%b9/post-276/#breadcrumblist>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://vef-eco.com/%E3%83%8B%E3%83%A5%E3%83%BC%E3%82%B9/post-276/>