<http://schema.org/topics>
"Cameron Winklevoss,Eduardo Saverin,Facebook,lawsuit,legal,mark zuckerberg,news,Social Media,the social network,trending,Tyler Winklevoss,Winklevoss twins"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/04/13/facebooks-complicated-ownership-history-explained/>