<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/980x551/548b5c5d21cc0_-_rbk-er-doctors-0713-1-s2.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g1750/tips-from-er-doctors/>