<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/980x1012/548fb2e764a32_-_rbk-nutritionist-foods-0713-9-s2.jpg>
<http://www.redbookmag.com/body/advice/g667/teeth-whitening-foods/>