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 |
| --- | --- | --- | --- | --- | --- |
| Alabama 1 | Frank W. Boykin | Democratic | 1935.0 | Re-elected | Frank W. Boykin (D) Unopposed |
| Alabama 2 | George M. Grant | Democratic | 1938.0 | Re-elected | George M. Grant (D) Unopposed |
| Alabama 3 | George W. Andrews | Democratic | 1944.0 | Re-elected | George W. Andrews (D) Unopposed |
| Alabama 4 | Kenneth A. Roberts | Democratic | 1950.0 | Re-elected | Kenneth A. Roberts (D) Unopposed |
| Alabama 5 | Albert Rains | Democratic | 1944.0 | Re-elected | Albert Rains (D) Unopposed |
| Alabama 6 | Armistead I. Selden, Jr. | Democratic | 1952.0 | Re-elected | Armistead I. Selden, Jr. (D) Unopposed |
Question:
How many candidates represent the district of kenneth a. roberts?
Answer:
1.0