To identify the largest restaurant groups in the United States. For reach restaurant group, the following should be provided: contact information for the chief executives, decision makers, and heads of marketing. Additionally, each company's market share should be provided both at the national and regional level. If there is any information about how their annual revenue breaks down in terms of online/carryout vs. dine-in that information should be included. If there is any information about their customer count, that should also be included.