<https://www.scenaripolitici.com/2019/02/sondaggio-demos-2-febbraio-2019.html#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.scenaripolitici.com/2019/02/sondaggio-demos-2-febbraio-2019.html>