<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/480x552/54eb9d8f8d7dd_-_13-cardio-laps-xl-29621363.jpg>
<http://www.womansday.com/health-fitness/g751/heart-smart-fitness-routine/>