<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x550/54ff94139be86-0314-boost-immunity-forest-s2.jpg>
<http://www.goodhousekeeping.com/health/advice/g1655/boost-your-immunity-all-day/>