<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.periodicolaperla.com/?option=com_content&view=article&id=5426%3Arememoraran-a-julia-de-burgos-y-albizu-campos&catid=119%3Aarticulos&Itemid=342>