<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/548a6035197a9_-_rbk-happiness-article-0712-5-msc.jpg>
<http://www.redbookmag.com/body/mental-health/how-to/a14066/how-to-be-happier/>