<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f676d1ba5f3_-_rbk-healthful-summer-foods-pears-qptpfm-s2.jpg>
<http://www.delish.com/food/news/g1510/foods-that-naturally-whiten-teeth/>