<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://mac.h-cdn.co/assets/cm/14/50/54880d13590ba_-_head-case-1112-2-xln.jpg>
<http://www.marieclaire.com/health-fitness/a7381/living-with-chronic-headaches/?click=rel>