<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.biobiochile.cl/noticias/2015/07/21/optimismo-en-el-gobierno-y-la-industria-pese-a-la-baja-en-el-precio-del-cobre.shtml>