<http://schema.org/topics>
"Celebrities,Entertainment,jimmy kimmel,Jimmy Kimmel Live,katy-perry,Selena Gomez,Television,Twitter,Uncategorized,Video,Videos,viral video,Watercooler"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2013/10/10/mean-tweets-musicians/>