<http://schema.org/topics>
"bill gates,Business,Facebook,mark zuckerberg,philanthropy,Social Good,the social network,trending,Warren Buffett"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/09/22/mark-zuckerberg-donates-100-million-to-newark-public-schools/>