<https://www.g20nagano2019.jp/index.php/2020/09/23/post-37007/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebPage>
<https://www.g20nagano2019.jp/index.php/2020/09/23/post-37007/>