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 | William J. Driver | Democratic | 1920.0 | Re-elected | William J. Driver (D) Unopposed |
| Arkansas 2 | Pearl Peden Oldfield | Democratic | 1929.0 | Retired Democratic hold | John E. Miller (D) Unopposed |
| Arkansas 3 | Claude Fuller | Democratic | 1928.0 | Re-elected | Claude Fuller (D) Unopposed |
| Arkansas 4 | Otis Wingo | Democratic | 1912.0 | Died in office Democratic hold | Effiegene Locke Wingo (D) Unopposed |
| Arkansas 5 | Heartsill Ragon | Democratic | 1922.0 | Re-elected | Heartsill Ragon (D) Unopposed |
| Arkansas 6 | David Delano Glover | Democratic | 1928.0 | Re-elected | David Delano Glover (D) Unopposed |
Question:
How many candidates ran in the election in the Arkansas 4 district? 
Answer:
1.0