<http://schema.org/headline>
"Google slates Pwnium 3 contest for March 7, offers up to $3.14159m for vulnerabilities in Chrome OS"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2013/01/28/google-slates-pwnium-3-contest-for-march-7-offers-up-to-3-14159m-for-vulnerabilities-in-chrome-os/>