<http://schema.org/topics>
"Apple,Apps and Software,education,Mobile,Social Good,Startups,tablets,Tech,Uncategorized,U.S.,wikipedia,World"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/01/17/interactive-textbook-makes-reading-social-braces-for-apple-announcement/>