<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/550047ba55903-b12-brain-food-lg.jpg>
<http://www.goodhousekeeping.com/health/diet-nutrition/g1967/vitamin-b12-super-foods-47012607/>