<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/980x1046/5489fdfd99a89_-_rbk-lazy-fitness-1113-1-s2.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g692/easy-leg-workout-at-home/>