<http://schema.org/topics>
"Bryan Ortiz,Business,coupons,discounts,features,group buying,groupon,LivingSocial,Mashable,Ortiz Fitness,Small Business,Tippr,Web Apps"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/06/04/group-buying-small-business/>