<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bulbs.com/High_Pressure_Sodium-High_Intensity_Discharge_(HID)_Ballasts-Ballasts-Category/over_$100/1_X_250W_--_749W/results.aspx>