<https://www.ilromanista.eu/news/as-roma/8236/calciomercato-roma-per-gennaio-spunta-il-nome-di-herrera>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.ilromanista.eu/news/as-roma/8359/as-il-real-madrid-vuole-pedro-ci-sono-anche-milan-e-roma->