<http://schema.org/alternativeHeadline>
"App Store sales passed $10 billion in 2013, developers have earned more than $15 billion in total"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apple/2014/01/07/app-store-downloads-pass-10-billion-2013-developers-earnt-15-bn/>