<http://schema.org/description>
"Apple may not have wanted Siri to work on the iPhone 4, but the virtual assistant is now doing your bidding on the older device, according to iClarified. Siri can now be downloaded ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apple/2011/12/05/siri-works-on-the-iphone-4-provided-it-is-jailbroken/>