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 | Candidates |
| --- | --- | --- | --- | --- | --- |
| Kentucky 4 | Frank Chelf | Democratic | 1944.0 | Re-elected | Frank Chelf (D) 53.1% Don Victor Drye (R) 46.9% |
| Kentucky 5 | Brent Spence | Democratic | 1930.0 | Re-elected | Brent Spence (D) 51.2% Marion W. Moore (R) 48.8% |
| Kentucky 6 | Virgil Chapman | Democratic | 1930.0 | Re-elected | Virgil Chapman (D) 55.0% W. D. Rogers (R) 45.0% |
| Kentucky 7 | Andrew J. May | Democratic | 1930.0 | Lost re-election Republican gain | W. Howes Meade (R) 59.3% Andrew J. May (D) 40.7% |
| Kentucky 8 | Joe B. Bates | Democratic | 1930.0 | Re-elected | Joe B. Bates (D) 52.6% Ray Schmauch (R) 47.4% |
Question:
What year was incumbent joe b. bates first elected?
Answer:
1930.0