<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/12/640x483/placeholder_5508f347a88cd-1405632911-triceps-kickbacks-with-side-lunge.gif>
<http://www.goodhousekeeping.com/health/fitness/a22086/new-dumbbell-exercises/>