<https://nuvola.corriere.it/2017/04/12/k-flex-lavoratori-gli-uni-contro-gli-altri/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://nuvola.corriere.it/2017/04/12/k-flex-lavoratori-gli-uni-contro-gli-altri/>