<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://sev.h-cdn.co/assets/cm/15/09/480x360/54eed107ac2ce_-_sev-pound-rockout-workout-lgn.jpg>
<http://www.seventeen.com/health/advice/g266/craziest-workout-classes/>