<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/320x240/548a5917886b5_-_20-spring-cleaning-de.jpg>
<http://www.redbookmag.com/home/tips/g1111/spring-cleaning-tips/>