Question: What chain of discount stores last operated in 1990 and used Mammoth Mart for their prototype?
Sentence (from "Gamble-Skogmo"): Business operated or franchised by Gamble-Skogmo included Gambles hardware and auto supply stores, Woman's World and Mode O'Day clothing stores, J.M. McDonald department stores, Leath Furniture stores, Tempo and Buckeye Mart Discount Stores, Howard's Brandiscount Department Stores, Rasco Variety Stores, Sarco Outlet Stores, Toy World, Rasco-Tempo, Red Owl Grocery, Snyder Drug and the Aldens mail-order company.
Relevant evidence: No