<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://pac-uk.org/index.php?option=com_content&view=article&id=38%3Ajust-text-giving-advert&catid=15%3Aaay-tv&Itemid=29>