<http://schema.org/topics>
"barbie,Behind The Social Media Campaign Series,Business,Business Lists,digital marketing,Facebook,features,Foursquare,Marketing,Mashable,online marketing,Social Media,social media marketing,Twitter"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/05/05/barbie-ken-social-media/>