<https://style.nikkei.com/article/DGXZQOLM148BH0U1A011C2000000?channel=ASH03004&k=202106110300&page=2>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://style.nikkei.com/article/DGXZQOLM148BH0U1A011C2000000?k=202106110300&page=2>