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 | Elected | Status | Opponent |
| --- | --- | --- | --- | --- | --- |
| Pennsylvania2 | William H. Gray | Democratic | 1978.0 | Re-elected | William H. Gray (D) 92.1% Donald Bakove (R) 7.9% |
| Pennsylvania6 | Gus Yatron | Democratic | 1968.0 | Re-elected | Gus Yatron (D) 57.0% John F. Hicks (R) 43.0% |
| Pennsylvania7 | Curt Weldon | Republican | 1986.0 | Re-elected | Curt Weldon (R) 65.3% John F. Innelli (D) 34.7% |
| Pennsylvania9 | Bud Shuster | Republican | 1972.0 | Re-elected | Bud Shuster (R) unopposed |
| Pennsylvania10 | Joseph M. McDade | Republican | 1962.0 | Re-elected | Joseph M. McDade (R) unopposed |
| Pennsylvania11 | Paul E. Kanjorski | Democratic | 1984.0 | Re-elected | Paul E. Kanjorksi (D) unopposed |
| Pennsylvania12 | John Murtha | Democratic | 1974.0 | Re-elected | John Murtha (D) 61.7% Bill Choby (R) 38.3% |
| Pennsylvania17 | George Gekas | Republican | 1982.0 | Re-elected | George Gekas (R) unopposed |
| Pennsylvania18 | Doug Walgren | Democratic | 1976.0 | Lost re-election Republican pick-up | Rick Santorum (R) 51.4% Doug Walgren (D) 48.6% |
| Pennsylvania19 | William F. Goodling | Republican | 1974.0 | Re-elected | William F. Goodling (R) unopposed |
| Pennsylvania20 | Joseph M. Gaydos | Democratic | 1968.0 | Re-elected | Joseph M. Gaydos (D) 65.6% Robert C. Lee (R) 34.4% |
Question:
What districts does incumbent Curt Weldon hold?
Answer:
Pennsylvania7