<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.foroatletismo.com/foro/atletismo-popular/39983-ma-ana-me-estreno-en-la-media-marat-n-de-madrid-alg-n-consejo.html>