<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eabaa313486_-_03-fresh-spinach_medium-1.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/a1447/5-foods-for-optimal-health-105433/>