<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.peta.org/?ReturnUrl=%2Fliving%2Fpages%2Fliving_articles%2Funavailable.aspx%3Fname%3DWin-The-Get-Healthy-Go-Vegan-Cookbook>