<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2013/01/23/South-tops-US-in-mental-health-meds-use/UPI-21811358981700/?spt=hs&or=hn>