<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/640x430/548a5e060422b_-_rbk-health-risks-0612-7-xln.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g1152/health-and-safety-risks/>