<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eb0963dc1ca_-_08_cleaning-mistakes-cleaning-spray_medium.jpg>
<http://www.womansday.com/home/organizing-cleaning/tips/a2641/8-common-cleaning-mistakes-to-avoid-124011/>