<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/548f2163eb969_-_rbk-happiness-tips-0114-1-xln.jpg>
<http://www.redbookmag.com/body/mental-health/how-to/a16441/tips-to-be-happier/>