"1977Z"^^ . . . . . . "Potbelly Corporation is a publicly traded restaurant chain that sells submarine sandwiches in the United States. The company is headquartered in the tower of the Merchandise Mart in the Near North Side, Chicago, Illinois."@en . "Potbelly Corporation"@en . . . . . "4358000.0"^^ . "3.2698E8"^^ . . "290"^^ . . .