<https://berenice.over-blog.it/2015/12/un-vulcano-a-spoleto-acqua-a-50-gradi-da-un-pozzo-domestico.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://berenice.over-blog.it/2015/12/un-vulcano-a-spoleto-acqua-a-50-gradi-da-un-pozzo-domestico.html>