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<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sanatisharif.sch.ir/category/%D9%81%D8%B9%D8%A7%D9%84%DB%8C%D8%AA%D9%87%D8%A7%DB%8C-%D9%85%D8%AF%D8%B1%D8%B3%D9%87/>