<http://schema.org/about>
"Bryan Cranston, Cher, Jack Black, Peter Dinklage sign up to record custom voicemails for Autism Speaks."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/lifestyle/arts-culture/blogs/walter-white-will-record-your-voicemail-greeting-for-charity>