<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://gioit.h-cdn.co/assets/16/31/640x320/landscape-1470391412-pancakes-ricetta-frutta.jpg>
<http://www.gioia.it/idee/cucina/how-to/a1436/pancakes-grano-saraceno-ricetta/>