<http://schema.org/topics>
"accessories,Android,cases,features,Gadgets,Google,Home,LG,Mobile,nexus 4,Tech,Travel &amp; Leisure,Travel,Uncategorized,Work and Play,Work &amp;amp; Play"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2013/06/19/nexus-4-cases/>