<https://ikuokoge.com/2021/01/15/gold/c981def7-472d-4d03-9fb4-a3bb045ac0ad/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ikuokoge.com/2021/01/15/gold/c981def7-472d-4d03-9fb4-a3bb045ac0ad/>