<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/08/54eaaa75672da_-_05-wd0110-bone-health-2.jpg>
<http://www.womansday.com/health-fitness/womens-health/tips/a1220/bone-health-tips-for-every-decade-102369/>