<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.greenhousegrower.com/varieties/variety-highlights-from-hgtv-dummen-bartels-beekenkamp-pac-elsner-westhoff-plug-connection-terra-nova-nurseries-skagit-gardens-vegetalis-and-floranova/>