<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/768x516/54eb9d8f2c616_-_12-cardio-exer-gaming-xl.jpg>
<http://www.womansday.com/health-fitness/g751/heart-smart-fitness-routine/>