<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.kilobooks.com/de-thi-hoc-sinh-gioi-cap-huyen-nam-hoc-2010-2011-mon-tieng-anh-lop-8-a-105504>