<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/AggregateRating>
<http://www.electronicsbazaar.com/apple-imac-me089hn-a-imac-intel-core-i5-8-gb-1-tb-2-gb-graphics-mac-os-x-mavericks>