<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/768x516/54eb9d8de52b9_-_9-warm-up-half-push-up-xl-70716113.jpg>
<http://www.womansday.com/health-fitness/g751/heart-smart-fitness-routine/>