<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54fea5a8eaa1f-salt-shaker-1110-s3.jpg>
<http://www.goodhousekeeping.com/health/diet-nutrition/a18717/truth-about-salt/>