Possible Clues:

• Western burger franchise __ Jr
• Sandburg and Sagan
• Bernstein and Lewis
• Reiner and Perkins
• Sandburg and Sagan, for two
• Maple Leaf Brewer and poet Sandburg
• Sagan and Sandburg
• Western burger franchise __ Jr.
• ___ Jr. (burger chain)
• ___ Jr. (fast-food chain)