<http://schema.org/topics>
"McDonalds,Memes,racism,seriously McDonald's,#seriouslyMcDonalds,Social Media,social networking,twitpic,Twitter,Watercooler"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/06/12/seriouslymcdonalds/>