<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://cos.h-cdn.co/assets/cm/14/25/53a08f7da5e36_-_cos-guy-holding-head-mdn.jpg>
<http://www.cosmopolitan.com/sex-love/news/a11128/men-get-sex-headaches/>