<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://cos.h-cdn.co/assets/cm/14/28/53bed12fd2f5a_-_cos-06-geting-ahead-at-work-mdn.jpg>
<http://www.cosmopolitan.com/career/news/a11603/chewing-gum-makes-you-productive/>