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 |
| --- | --- | --- | --- | --- | --- |
| Pennsylvania 1 | Leon Sacks | Democratic | 1936.0 | Lost re-election Republican gain | James A. Gallagher (R) 53.5% Leon Sacks (D) 46.5% |
| Pennsylvania 7 | Hugh Scott | Republican | 1940.0 | Re-elected | Hugh Scott (R) 55.7% Thomas Z. Minehart (D) 44.3% |
| Pennsylvania 11 | Patrick J. Boland | Democratic | 1930.0 | Died in office Democratic hold | John W. Murphy (D) 55.8% James K. Peck (R) 44.2% |
| Pennsylvania 13 | Ivor D. Fenton | Republican | 1938.0 | Re-elected | Ivor D. Fenton (R) 58.2% J. Noble Hirsch (D) 41.8% |
| Pennsylvania 25 | Charles I. Faddis | Democratic | 1932.0 | Lost renomination Democratic hold | Grant Furlong (D) 50.3% M. B. Armstrong (R) 49.7% |
| Pennsylvania 27 | Harve Tibbott | Republican | 1938.0 | Re-elected | Harve Tibbott (R) 55.6% Eddie McCloskey (D) 44.4% |
Question:
what was the number of candidates when Leon Sacks was incumbent?
Answer:
1.0