<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/640x320/54cfd88fb4526_-_football-helmets-0814-de.jpg>
<http://www.popularmechanics.com/adventure/sports/a11141/these-helmets-will-save-the-nfl-from-itself-17124971/?click=pm_news>