<http://schema.org/topics>
"Business,Business Lists,contributor,features,flickr,groupon,Ignighter,instagram,Lists,paypal,shopify,Startups,Startups Lists,turntable.fm,Twitter,woot,yelp,YouTube"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/07/08/startups-change-direction/>