<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eb80a8c4f17_-_drill-2-tricep-extensions_slideshow_image-42-gcnfgy-mdn.jpg>
<http://www.womansday.com/health-fitness/workout-routines/advice/g158/boot-camp-workout-1549/>