<http://shuntarotanaka.com/2019-12-25%e3%80%80n%e9%9f%bf%e7%ac%ac%e4%b9%9d/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://shuntarotanaka.com/2019-12-25%E3%80%80n%E9%9F%BF%E7%AC%AC%E4%B9%9D/>