<https://techtarget.itmedia.co.jp/tt/news/0908/07/news03.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://techtarget.itmedia.co.jp/tt/news/0908/07/news03.html>