Question: Where is the headquarter of an American restaurant holding company who's chairman and chief executive officer was Jon L. Luther?
Related documents: [0]  [DOC] Jon L. Luther is an American foodservice industry executive. He was the chairman and chief executive officer of Dunkin' Brands. Luther is the Chairman of the Board of the Culinary Institute of America and Arby's Restaurant Group, and a director at Six Flags Entertainment Corporation, Wingstop Restaurants, and Tempur Sealy International. [END] 
[1]  [DOC] Dunkin' Brands Group, Inc. is an American restaurant holding company which runs two chains of fast-food restaurants: Dunkin' Donuts and Baskin-Robbins. It is headquartered in Canton, Massachusetts. [END] 
Answer: 
Canton, Massachusetts
Canton, Massachusetts