<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/54eb4b7f5d160_-_what-is-it-worth-am-radio-1212-kyic9p-xln.jpg>
<http://www.countryliving.com/shopping/antiques/g1098/what-its-worth/>