<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bulbs.com/4--Pin-Fluorescent_Ballasts_--_Compact_(CFL)_Plug_In-Ballasts-Category/120V-Input_Volts/2_x_10W_--_19W/2-Number_of_Lamps/results.aspx?pid=398>