<https://hosei-jinkan-club.jp/report-20181027-urayasu/%ef%bc%99%e9%83%b7%e5%9c%9f%e8%b3%87%e6%96%99%e9%a4%a8/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
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