<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Top_News/World-News/2013/01/23/Cameron-to-call-for-yes-no-UK-vote-on-EU/UPI-98391358926200/?rel=29001359149022>