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<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://alternative-barcelona.com/ja/%E9%A2%A8%E6%99%AF%E3%81%A8%E3%81%96%E3%82%8F%E3%82%81%E3%81%8D/palau-guell/>