<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.biobiochile.cl/noticias/2015/04/15/expropiacion-del-mercado-central-de-concepcion-volador-de-luces-o-un-buen-negocio.shtml>