<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/Blog/2013/06/12/Mars-Dry-ice-hovercraft-sled-down-sand-dunes/4971371046431/?st_rec=8431371050431>