<http://schema.org/description>
"A survey from the Pew Internet and American Life Project reports that younger internet users (18 to 24 years-old) are more likely to use Twitter than any..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.com/2009/10/21/young-users-embrace-tweet_n_329063.html>