<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/768x516/54eba5adec27b_-_5-woman-holding-knee-pain-xl.jpg>
<http://www.womansday.com/health-fitness/g858/ways-to-improve-your-health/?link=emb&dom=yah_life&src=syn&con=blog_wd&mag=wdy>