<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cambodiaun.org/?view=article&catid=20:may-11&id=121:dpm-hor-namhongs-letter-to-indonesian-foreign-minister-over-package-of-solutions&format=pdf>