<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f94ff911316_-_clv-yogurt-with-blueberries-qh8hax-lgn.jpg>
<http://www.delish.com/cooking/news/a39885/homemade-greek-yogurt-clv0514/>