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:
| District | Incumbent | Party | First elected | Result |
| --- | --- | --- | --- | --- |
| California 1 | William F. Englebright | Republican | 1906.0 | Lost re-election Democratic gain |
| California 2 | Duncan E. McKinlay | Republican | 1904.0 | Defeated in primary Republican hold |
| California 3 | Joseph R. Knowland | Republican | 1904.0 | Re-elected |
| California 4 | Julius Kahn | Republican | 1898.0 | Re-elected |
| California 5 | Everis A. Hayes | Republican | 1904.0 | Re-elected |
| California 6 | James C. Needham | Republican | 1898.0 | Re-elected |
| California 7 | James McLachlan | Republican | 1900.0 | Defeated in primary Republican hold |
| California 8 | Sylvester C. Smith | Republican | 1904.0 | Re-elected |
Question:
What was the district Incumbent Julius Kahn was in that was smaller than 1906?
Answer:
California 4