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<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://phuketmeetingconference.com/news/tag/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%AA%E0%B8%B1%E0%B8%A1%E0%B8%A1%E0%B8%99%E0%B8%B2%E0%B8%A0%E0%B8%B9%E0%B9%80%E0%B8%81%E0%B9%87%E0%B8%95/>