<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eb620cb0c19_-_05-origami-crane-instructions.jpg>
<http://www.womansday.com/home/crafts-projects/how-to/a5122/how-to-make-an-origami-crane-107649/>