<http://schema.org/description>
"Blizzard just posted a blog introducing an exciting feature coming in Patch 5.4--Proving Grounds. In Proving Grounds, players can try out new roles in a safe environment (no PuGs being angry you failed at something new), or push their limits on high-difficulty settings. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wowhead.com/news=216726.1/5-4-ptr-proving-grounds-preview>