00542cz a2200133n 4500 n 2011073800 DLC 20250804185829.7 111020n| azannaabn |n ana n 2011073800 DLC eng rda DLC Groupon (Firm) Andrew Mason and Groupon, 2013: ECIP t.p. (Groupon) Wikipedia, viewed Oct. 20, 2011 (Groupon, which was launched in Nov. 2008, is a deal-of-the-day website that features discounted gift certificates usable at local or national companies; website: www.groupon.com)