<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/980x488/548bfb555fff2_-_rbk-pinterest-25-minute-day6.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/a16430/interval-workouts/>