<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/980x551/548fb2e84e0d8_-_rbk-best-food-choices-apples-s2.jpg>
<http://www.redbookmag.com/body/advice/g667/teeth-whitening-foods/>