<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/14/50/980x490/548a59122c421_-_9-spring-cleaning-de-277949.jpg>
<http://www.redbookmag.com/home/tips/g1111/spring-cleaning-tips/>