<https://www.dbdnetwork.it/#organization>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.deabyday.tv/ecologia-e-ambiente/consigli-in-pi-/article/586/I-5-consigli-per-passare-un-Natale-davvero-ecologico.html>