<http://schema.org/description>
"Some of you may make calls from Gmail.  Especially international calls, and while Google Voice offers great prices, you can still blow through the minutes you've purchased.\r\n\r\nThe Google ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2011/09/20/google-voice-lets-you-top-up-automatically-with-auto-recharge/autorecharge/>