<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://gioit.h-cdn.co/assets/16/16/980x1127/1461269738-hbz-vintage-paris-1954-gettyimages-78965227.jpg>
<http://www.gioia.it/idee/viaggi/news/g498/parigi-vintage-foto-bianco-nero/>