<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/Offer>
<https://wanelo.co/p/1461976/the-giving-tree-with-apple-logo-hard-case-for-apple-iphone-4-case-iphone-4s-case-iphone-4-hard-case-iphone-case>