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 |
| --- | --- | --- | --- | --- | --- |
| Florida 2 | Charles Edward Bennett | Democratic | 1948.0 | Re-elected | Charles Edward Bennett (D) Unopposed |
| Florida 3 | Robert L. F. Sikes | Democratic | 1940.0 | Re-elected | Robert L. F. Sikes (D) Unopposed |
| Florida 4 | William C. Lantaff | Democratic | 1950.0 | Retired Democratic hold | Dante Fascell (D) Unopposed |
| Florida 5 | Albert S. Herlong, Jr. | Democratic | 1948.0 | Re-elected | Albert S. Herlong, Jr. (D) Unopposed |
| Florida 6 | Dwight L. Rogers | Democratic | 1944.0 | Re-elected | Dwight L. Rogers (D) Unopposed |
Question:
 how many first elected with incumbent being william c. lantaff
Answer:
1.0