<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/320x320/55003e8d1b552-heel-walk-exercise-0403-fb.jpg>
<http://www.goodhousekeeping.com/health/fitness/g1876/home-workout-apr03/>