<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/12/640x409/placeholder_5508f345c85c4-1405637056-plank-row-with-knee-twist-3-1.gif>
<http://www.goodhousekeeping.com/health/fitness/a22086/new-dumbbell-exercises/>