<https://180post.com/archives/tag/%d8%a7%d9%84%d9%85%d9%87%d9%86%d8%af%d8%b3#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://180post.com/archives/tag/%D8%A7%D9%84%D9%85%D9%87%D9%86%D8%AF%D8%B3>