<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/980x653/548f1f7d19018_-_rbk-sleep-experts-1213-1-s2.jpg>
<http://www.redbookmag.com/body/health-fitness/advice/g2017/doctor-tips-for-better-sleep/>