<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54ebb9bad0086_-_11-woman-tired-workout-x_.jpg>
<http://www.womansday.com/health-fitness/womens-health/advice/g1183/sleep-deprivation-effects/>