<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54fe721eb5087-posture-chin-drop-0704-de.jpg>
<http://www.goodhousekeeping.com/health/wellness/a16015/slouching-posture-may04/?src=shelter_footer>