<https://www.pedal.ir/topic/%d8%b1%d9%86%d9%88-%d9%85%da%af%d8%a7%d9%86/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.pedal.ir/topic/%D8%B1%D9%86%D9%88-%D9%85%DA%AF%D8%A7%D9%86/>