<http://schema.org/description>
"Hacking electronic road signs so that they display warnings of impending zombie invasions has become something of a national pastime. Such pranks have taken place in Florida, Illinois, Kentucky, Maryland, Pennsylvania, Texas, and probably elsewhere."^^<http://www.w3.org/2001/XMLSchema#string>
<http://archives.sfweekly.com/thesnitch/2011/07/15/zombies-to-plunder-san-francisco-traffic-sign-warns>