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 | Game site | TV Time | Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | September 6, 1998 | at Carolina Panthers | W 19-14 | Ericsson Stadium | FOX 1:00et | 65,129 |
| 2.0 | September 13, 1998 | Philadelphia Eagles | W 17-12 | Georgia Dome | FOX 1:00et | 46,456 |
| 3.0 | Bye | Bye | Bye | Bye | Bye | Bye |
| 4.0 | September 27, 1998 | at San Francisco 49ers | L 20-31 | Candlestick Park | FOX 4:15et/1:15pt | 62,296 |
| 5.0 | October 4, 1998 | Carolina Panthers | W 51-23 | Georgia Dome | FOX 1:00et | 50,724 |
| 6.0 | October 11, 1998 | at New York Giants | W 34-20 | Giants Stadium | ESPN 8:15et | 71,173 |
| 7.0 | October 18, 1998 | New Orleans Saints | W 31-23 | Georgia Dome | FOX 1:00et | 60,774 |
| 8.0 | October 25, 1998 | at New York Jets | L 3-28 | The Meadowlands | FOX 1:00et | 71,573 |
| 9.0 | November 1, 1998 | St. Louis Rams | W 38-15 | Georgia Dome | FOX 1:00et | 37,996 |
| 10.0 | November 8, 1998 | at New England Patriots | W 41-10 | Foxboro Stadium | FOX 1:00et | 59,790 |
| 11.0 | November 15, 1998 | San Francisco 49ers | W 31-19 | Georgia Dome | FOX 1:00et | 69,828 |
| 12.0 | November 22, 1998 | Chicago Bears | W 20-13 | Georgia Dome | FOX 1:00et | 60,804 |
| 13.0 | November 29, 1998 | at St. Louis Rams | W 21-10 | Trans World Dome | FOX 1:00et/12:00ct | 47,971 |
| 14.0 | December 6, 1998 | Indianapolis Colts | W 28-21 | Georgia Dome | CBS 1:00et | 61,141 |
| 15.0 | December 13, 1998 | at New Orleans Saints | W 27-17 | Louisiana Superdome | FOX 1:00et/12:00ct | 61,678 |
| 16.0 | December 20, 1998 | at Detroit Lions | W 24-17 | Pontiac Silverdome | FOX 4:15et | 67,143 |
| 17.0 | December 27, 1998 | Miami Dolphins | W 38-16 | Georgia Dome | CBS 1:00et | 69,754 |
Question:
Who was the opponent on september 27, 1998?
Answer:
at San Francisco 49ers