<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ticketmonster.com/buy-Cirque-du-Soleil---KA-tickets-at-Cirque-du-Soleil-Theater---MGM-Grand-Las-Vegas-Nevada-05-10-2014/445368>