<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/320x320/54ff24467a77f-thigh-stair-1-1000-fb.jpg>
<http://www.goodhousekeeping.com/health/fitness/g773/thigh-workout-oct00/>