<https://news.gandi.net/ja/2020/09/promotion-on-5-domains-extended-until-the-end-of-december>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://news.gandi.net/ja/2020/09/promotion-on-5-domains-extended-until-the-end-of-december/>