<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/54eb4b9e94f72_-_whats-is-it-worth-rocking-chair-0311-mdn.jpg>
<http://www.countryliving.com/shopping/antiques/g1098/what-its-worth/>