<http://schema.org/topics>
"Android,Business,Mashable,news,popurls,Social Media,social networking,Tweetup,twidroid,twidroyd,Twitter,web,web 2.0"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/07/06/tweetup-acquires-twidroid-popurls/>