_:nfe5279a26980494a8fa640a070852576xb1
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://idebook.ir/books/71883/%D9%82%D9%84%D9%82%D9%84%DA%A9-3-%D9%84%D8%B7%DB%8C%D9%81%D9%87-%D9%87%D8%A7%DB%8C-%D8%B3%D8%B1-%D9%88-%D8%AA%D9%87>