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 |
| --- | --- | --- | --- | --- | --- |
| Tennessee 1 | Jimmy Quillen | Republican | 1962.0 | Re-elected | Jimmy Quillen (R) 68.9% John B. Russell (D) 31.1% |
| Tennessee 2 | John Duncan, Sr. | Republican | 1964.0 | Re-elected | John Duncan, Sr. (R) 76.2% John F. Bowen (D) 23.8% |
| Tennessee 3 | Marilyn Lloyd | Democratic | 1974.0 | Re-elected | Marilyn Lloyd (D) 53.9% Jim Golden (R) 46.1% |
| Tennessee 4 | Jim Cooper | Democratic | 1982.0 | Re-elected | Jim Cooper (D) Unopposed |
| Tennessee 6 | Bart Gordon | Democratic | 1984.0 | Re-elected | Bart Gordon (D) 76.8% Fred Vail (R) 23.2% |
| Tennessee 7 | Don Sundquist | Republican | 1982.0 | Re-elected | Don Sundquist (R) 72.3% M. Lloyd Hiler (D) 27.7% |
Question:
Name number first elected for tennessee 2?
Answer:
1.0