<http://schema.org/description>
"As a way to entice users to purchase more items for City Cash in CityVille, Zynga has launched a Buy 2 Get 1 free program within the game&amp;#039;s store, offering you a chance to do just that - buy"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2011/11/11/cityville-buy-two-get-one-special-offer/20104888/>