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<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://e-market.jp/2020/08/11/r-pallet-a-2-2-2-28-10-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-3-2-2-2-3-3-3-4-3/>