<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Organization>
<http://www.informazione.it/a/51382D88-5290-4187-8274-90B0B71423CB/Istat-Quella-parte-di-economia-non-osservata-nei-conti-nazionali>