<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/ebook/works-of-robert-frost-150-includes-a-boy-s-will-north-of-boston-mountain-interval-and-other-poems-mobi-collected-works>