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 |
| --- | --- | --- | --- | --- | --- |
| Arkansas 1 | Ezekiel C. Gathings | Democratic | 1938.0 | Re-elected | Ezekiel C. Gathings (D) Unopposed |
| Arkansas 2 | Wilbur Mills | Democratic | 1938.0 | Re-elected | Wilbur Mills (D) Unopposed |
| Arkansas 4 | William Fadjo Cravens | Democratic | 1943.0 | Re-elected | William Fadjo Cravens (D) Unopposed |
| Arkansas 5 | Brooks Hays | Democratic | 1942.0 | Re-elected | Brooks Hays (D) 87.1% Lonzo A. Ross (R) 12.9% |
| Arkansas 6 | William F. Norrell | Democratic | 1938.0 | Re-elected | William F. Norrell (D) Unopposed |
Question:
What is the earliest years any of the incumbents were first elected? 
Answer:
1938.0