<http://schema.org/about>
"Read the rules, then take the survey to win. No purchase necessary to enter or win. Giveaway begins Monday, October 10, 2011 12:30 p.m. EST and ends on Tuesday,"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/money/green-workplace/sponsorstory/official-rules-georgia-pacific-prize-package-2011>