<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/548fc3d3949b6_-_rbk-tracy-anderson-workout-core-bust-xln.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g611/tracy-anderson-workout-tips/>