<http://schema.org/about>
"Attention teachers: Stop by your local Chipotle on Tuesday, May 7, for buy 1 get 1 free burritos, bowls, salads or tacos."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/money/sustainable-business-practices/blogs/chipotle-bogo-offer-for-teacher-appreciation-day>