<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/5489e63cdd059_-_rbk-tummy-exercises-3-0112-xl.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g544/flat-tummy-exercises/>