<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/160x213/54eb7f9483e83_-_pump-up-your-immune-system-with-oysters-and-crab-mdn.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/g139/34-stay-healthy-superfoods-5411/>