<https://ar.wikihow.com/%D8%B9%D9%84%D8%A7%D8%AC-%D8%A7%D9%84%D8%A5%D8%B3%D9%87%D8%A7%D9%84>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ar.wikihow.com/%D8%B9%D9%84%D8%A7%D8%AC-%D8%A7%D9%84%D8%A5%D8%B3%D9%87%D8%A7%D9%84>