<http://schema.org/topics>
"b2b,b2b apps,b2b marketing series,Business,news,features,Marketing,marketing apps,Mashable,sentiment analysis,Social Media,social media apps,social media tools,social software"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/04/08/b2b-marketing-tools/>