Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Episode # | The Wørd | Guest | Introductory phrase | Original airdate | Production code |
| --- | --- | --- | --- | --- | --- |
| 804.0 | "None" | Jake Tapper , Michelle Rhee | None | December 01 | 6152.0 |
| 806.0 | "Unrequited Gov" | Garry Trudeau | None | December 06 | 6154.0 |
| 807.0 | "None" | Julie Nixon Eisenhower and David Eisenhower | None | December 07 | 6155.0 |
| 809.0 | "None" | Daniel Ellsberg , William Wegman , Julie Taymor | None | December 09 | 6157.0 |
| 811.0 | "None" | David Boies , Biz Stone , Stephen Sondheim | None | December 14 | 6159.0 |
Question:
What is the  episode # when the guests were julie nixon eisenhower and david eisenhower?
Answer:
807.0