<http://schema.org/description>
"Twitter has today announced that it has eliminated its standard 'Twitter' logo, converting it over to a simple version of the blue bird most associated with the service. It's a simple ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2012/06/06/twitter-changes-its-logo-to-a-simplified-twitterbird-crafted-out-of-overlapping-circles/>