<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.foroatletismo.com/foro/compra-venta/41441-vendo-pulsometro-polar-rcx5-tdf-gps-sensor-de-cadencia-soporte-de-manillar.html>