<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eac784bd064_-_01-gel-cap-vitamins-1.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/a1630/everything-you-need-to-know-about-vitamins-107812/>