<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/2014/04/02/Microsoft-unveils-Windows-Phone-81-digital-assistant-Cortana/3391396462517/?spt=sec&or=bn?spt=rln&or=4>