<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/320x320/55003e7f2329b-loop-hamstring-curl-0305-fb.jpg>
<http://www.goodhousekeeping.com/health/fitness/g2043/loop-workout-mar05/?src=shelter_footer>