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 | Status | Opponent |
| --- | --- | --- | --- | --- | --- |
| Pennsylvania4 | Ron Klink | Democratic | 1992.0 | Re-elected | Ron Klink (D) 64.2% Ed Peglow (R) 35.8% |
| Pennsylvania5 | William F. Clinger, Jr. | Republican | 1978.0 | Re-elected | William F. Clinger, Jr. (R) unopposed |
| Pennsylvania7 | Curt Weldon | Republican | 1986.0 | Re-elected | Curt Weldon (R) 69.7% Sara R. Nichols (D) 30.3% |
| Pennsylvania9 | Bud Shuster | Republican | 1972.0 | Re-elected | Bud Shuster (R) unopposed |
| Pennsylvania12 | John Murtha | Democratic | 1974.0 | Re-elected | John Murtha (D) 68.9% Bill Choby (R) 31.1% |
| Pennsylvania17 | George Gekas | Republican | 1982.0 | Re-elected | George Gekas (R) unopposed |
| Pennsylvania18 | Rick Santorum | Republican | 1990.0 | Retired to run for U.S. Senate Democratic gain | Michael F. Doyle (D) 54.8% John McCarty (R) 45.2% |
| Pennsylvania19 | William F. Goodling | Republican | 1974.0 | Re-elected | William F. Goodling (R) unopposed |
Question:
How many republican incumbents first elected in 1974?
Answer:
1.0