<http://schema.org/query-input>
"required name=search_keywords"^^<http://www.w3.org/2001/XMLSchema#string>
<http://ejaba.net/277837/%D8%AC%D9%85%D8%B9-%D9%83%D9%84%D9%85%D8%AA-%D9%84%D8%A4-%D9%84%D8%A4>