<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.womansday.com/health-fitness/nutrition/advice/a1630/everything-you-need-to-know-about-vitamins-107812/?click=ht>