<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://gioit.h-cdn.co/assets/16/16/980x1221/1461269719-hbz-vintage-paris-1951-gettyimages-2667281.jpg>
<http://www.gioia.it/idee/viaggi/news/g498/parigi-vintage-foto-bianco-nero/>