<http://schema.org/topics>
"Gadgets,gallery,Home,How To,Lifestyle,pinterest,top 10 pinterest pins,trending,Trending Big,Uncategorized"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/11/25/top-10-pinterest-pins-11-25/?WT.mc_id=en_gadgets>