<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.matb3aa.com/song/%d8%a7%d8%ba%d9%86%d9%8a%d8%a9-%d8%a7%d9%86-%d8%b7%d8%a8%d9%84%d8%aa.html>