<http://schema.org/description>
"Starting today, Twitter has announced that developers will have access to a new field in the Twitter API called &amp;quot;possibly_sensitive&amp;quot;. This field will eventually allow developers ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/twitter/2011/07/29/twitter-plans-to-add-an-nsfw-flag-for-sensitive-tweets/>