<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eb809d9c0f5_-_drill-2-walking-lunges_slideshow_image-30-7vbemr-mdn.jpg>
<http://www.womansday.com/health-fitness/workout-routines/advice/g158/boot-camp-workout-1549/>