<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/12/55090b3114654-0112-roland-gold-balsamic-vinegar-of-modena-rj4jn3-msc.jpg>
<http://www.goodhousekeeping.com/food-products/balsamic-vinegar/a18331/balsamic-vinegar-taste-test/>