<http://schema.org/topics>
"Facebook,Movies,internet hoax,Memes,Photography,Social Media,trending,Twitter,Uncategorized,U.S.,Video,Videos,Watercooler,web hoaxes,World"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/06/27/back-to-the-future-hoax-explained/>