<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x551/54fed741cad64-ghk-things-you-think-are-dirty-dogs-s2.jpg>
<http://www.goodhousekeeping.com/home/cleaning/tips/g315/not-so-dirty-things/>