<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://celiac.org/page/5/?option=com_content&view=article&id=4%3Awhat-happens-with-celiac-disease&catid=1%3Aabout-celiac-disease&Itemid=23>