<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eaf769770b8_-_08-do-supplements-that-claim-to-boost-your-mood_medium.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/a2375/what-you-should-know-about-taking-vitamins-116341/>