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:
| Week | Date | Opponent | Result | Attendance |
| --- | --- | --- | --- | --- |
| 1.0 | September 2, 1979 | at Seattle Seahawks | W 33–16 | 62887.0 |
| 2.0 | September 9, 1979 | Oakland Raiders | W 30–10 | 50255.0 |
| 3.0 | September 16, 1979 | Buffalo Bills | W 27–19 | 50709.0 |
| 4.0 | September 23, 1979 | at New England Patriots | L 27–21 | 60916.0 |
| 5.0 | September 30, 1979 | San Francisco 49ers | W 31–9 | 50893.0 |
| 6.0 | October 7, 1979 | at Denver Broncos | L 7–0 | 74997.0 |
| 7.0 | October 14, 1979 | Seattle Seahawks | W 20–10 | 50077.0 |
| 8.0 | October 21, 1979 | at Los Angeles Rams | W 40–16 | 64245.0 |
| 9.0 | October 25, 1979 | at Oakland Raiders | L 45–12 | 53709.0 |
| 10.0 | November 4, 1979 | at Kansas City Chiefs | W 20–14 | 59353.0 |
| 11.0 | November 11, 1979 | at Cincinnati Bengals | W 26–24 | 40782.0 |
| 12.0 | November 18, 1979 | Pittsburgh Steelers | W 35–7 | 51910.0 |
| 13.0 | November 25, 1979 | Kansas City Chiefs | W 28–7 | 50078.0 |
| 14.0 | December 2, 1979 | Atlanta Falcons | L 28–26 | 50198.0 |
| 15.0 | December 9, 1979 | at New Orleans Saints | W 35–0 | 61059.0 |
| 16.0 | December 17, 1979 | Denver Broncos | W 17–7 | 51906.0 |
Question:
On September 30, 1979, in a week before week 8, what was the result?
Answer:
W 31–9