<http://schema.org/headline>
"Chrome OS fends off all hacks at Pwnium 3, others fall at Pwn2Own"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2013/03/08/chrome-os-fends-off-all-hacks-at-pwnium-3-others-fall-at-pwn2own/>