<http://www.periodicoconstruccion.com/2017/05/#listItem>
<http://schema.org/position>
"3"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://www.periodicoconstruccion.com/2017/05/adif-renovara-las-traviesas-de-un-tramo-entre-vitoria-y-burgos/>