<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.utwente.nl/nl/az/wewi/onderzoeksrapporten/Rapporten/techniek%2C%20technologie%20en%20chemische%20analyse/Archief/1998.157/>