<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bulbs.com/T8_Lamps-Fluorescent_Ballasts_--_U--Bent-Ballasts-Category/277V-Input_Volts/$20_--_$30/results.aspx>