<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://community.skype.com/t5/Skype%E4%BC%91%E6%81%AF%E5%AE%A4/%E8%BD%89%E6%8F%9BSKYPE%E5%BE%8C-%E5%8E%9F%E6%9C%AC%E5%B0%81%E9%8E%96%E7%9A%84%E8%81%AF%E7%B5%A1%E4%BA%BA%E9%83%BD%E7%9C%8B%E5%88%B0%E6%88%91%E4%B8%8A%E7%B7%9A%E4%BA%86/m-p/1418307>