<http://schema.org/topics>
"alicia keys,AOL,AT&amp;T,bet,bing,bruce springsteen,CBS,Celebrities,news,CNN,coldplay,fancast,george clooney,gigya,haiti,hulu,jay-z,justin timberlake,keith urban,kid rock,MTV,MySpace,sheryl crow,Social Media,sprint,taylor swift,Television,tv.com,U2,verizon,vh1,webcast,Yahoo,YouTube"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/01/21/help-haiti-now-webcast/>