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 | Round | Opponent | Venue | Result | Attendance | Scorers |
| --- | --- | --- | --- | --- | --- | --- |
| 15 October 1997 | 3 | Blackburn Rovers | H | 1-1 | 18,671 | Di Matteo |
| After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties | After extra time, Chelsea won on 4-1 on penalties |
| 19 November 1997 | 4 | Southampton | H | 2-1 | 20,968 | Morris , Flo |
| 7 January 1998 | QF | Ipswich Town | A | 2-2 | 22,088 | Le Saux , Flo |
| 28 January 1998 | SF | Arsenal | A | 1-2 | 38,144 | Hughes |
| 18 February 1998 | SF | Arsenal | H | 3-1 | 34,330 | Petrescu , Di Matteo, Hughes |
| 29 March 1998 | F | Middlesbrough | N | 2-0 | 77,698 | Sinclair , Di Matteo |
Question:
What was the attendance when the result was 1-1?
Answer:
18671.0