user: Question: What is the  episode # when the guests were Julie Nixon Eisenhower and David Eisenhower?
Columns: ['Episode #', 'The Wørd', 'Guest', 'Introductory phrase', 'Original airdate', 'Production code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [804.0, '"None"', 'Jake Tapper , Michelle Rhee', 'None', 'December 01', 6152.0]
SQL:

assistant: SELECT "Episode #" FROM "Table" WHERE "Guest" = 'Julie Nixon Eisenhower and David Eisenhower';