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:
| Date | Time | Opponent# | Site | TV | Result | Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| August 29 | 7:30 PM | Appalachian State* | Groves Stadium • Winston-Salem, NC |  | W 19–13 | 21,129 |
| September 7 | 6:30 PM | #13 Northwestern* | Groves Stadium • Winston-Salem, NC | FSN | W 28–27 | 21,749 |
| September 14 | 7:00 PM | at Georgia Tech | Bobby Dodd Stadium • Atlanta, GA |  | L 10–30 | 45,750 |
| September 21 | 12:00 PM | #20 Virginia | Groves Stadium • Winston-Salem, NC | JPS | L 7–42 | 23,220 |
| September 28 | 12:00 PM | at Clemson | Memorial Stadium • Clemson, SC | JPS | L 10–21 | 63,263 |
| October 5 | 6:30 PM | #15 North Carolina | Groves Stadium • Winston-Salem, NC |  | L 6–45 | 25,681 |
| October 19 | 2:00 PM | at Maryland | Byrd Stadium • College Park, MD |  | L 0–52 | 30,212 |
| October 26 | 1:00 PM | Navy* | Groves Stadium • Winston-Salem, NC |  | L 18–47 | 17,307 |
| November 9 | 12:00 PM | vs. #3 Florida State | Citrus Bowl • Orlando, FL | JPS | L 7-44 | 34,974 |
| November 16 | 1:00 PM | Duke | Groves Stadium • Winston-Salem, NC |  | W 17–16 | 17,842 |
| November 23 | 1:00 PM | at NC State | Carter–Finley Stadium • Raleigh, NC |  | L 22–37 | 40,500 |
Question:
when was the first time the attendance was below 20,000?
Answer:
October 26