<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0e9bb6c9c7_-_tb_copy-percent20of-percent20373_5.jpg>
<http://www.popularmechanics.com/home/how-to/a160/1275836/>