<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.abt.com/product/87163/KitchenAid-42-Built-In-Stainless-Steel-French-Door-Refrigerator-With-Platinum-Interior-Design-KBFN502ESS.html>