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 1 | Noble Jones Gregory | Democratic | 1936.0 | Re-elected | Noble Jones Gregory (D) Unopposed |
| Kentucky 2 | Beverly M. Vincent | Democratic | 1937.0 | Re-elected | Beverly M. Vincent (D) Unopposed |
| Kentucky 3 | Emmet O'Neal | Democratic | 1934.0 | Re-elected | Emmet O'Neal (D) 60.0% Ben J. Brumleve (R) 40.0% |
| Kentucky 5 | Brent Spence | Democratic | 1930.0 | Re-elected | Brent Spence (D) 61.2% Henry J. Cook (R) 38.8% |
| Kentucky 7 | Andrew J. May | Democratic | 1930.0 | Re-elected | Andrew J. May (D) 56.8% James W. Turner (R) 43.2% |
| Kentucky 8 | Joe B. Bates | Democratic | 1930.0 | Re-elected | Joe B. Bates (D) 58.0% H. Clell Hayes (R) 42.0% |
Question:
Who were the candidates when Noble Jones Gregory was incumbent?
Answer:
Noble Jones Gregory (D) Unopposed