<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/768x516/54eba09a52e95_-_6-woman-holding-knee-pain-xl.jpg>
<http://www.womansday.com/health-fitness/womens-health/advice/g772/ease-symptoms-of-aging/?src=shelter_footer>