_:nb615863bb0f9407d85d04299bbc42d6exb0
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.faraketab.ir/book/1374-%D8%AF%D9%84%D8%A7%D9%88%D8%B1%D8%A7%D9%86-%D9%82%D9%84%D8%B9%D9%87-%D8%AE%D9%88%D8%B1%D8%B4%DB%8C%D8%AF>