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:
| Tie no | Home team | Score | Away team | Attendance |
| --- | --- | --- | --- | --- |
| 1 | Bolton Wanderers | 1 – 0 | Fulham | 16,151 |
| 2 | Tottenham Hotspur | 1 – 1 | Nottingham Forest | 35,640 |
| replay | Nottingham Forest | 0 – 3 | Tottenham Hotspur | 28,062 |
| 3 | Everton | 0 – 2 | Manchester United | 38,664 |
| 4 | Charlton Athletic | 1 – 2 | Leicester City | 23,719 |
| 5 | Burnley | 0 – 0 | Blackburn Rovers | 21,468 |
| replay | Blackburn Rovers | 2 – 1 | Burnley | 28,691 |
| 6 | Southampton | 2 – 2 | Brentford | 24,741 |
| replay | Brentford | 1 – 3 | Southampton | 11,720 |
| 7 | Newcastle United | 1 – 0 | Chelsea | 45,740 |
| 8 | Arsenal | 1 – 1 | Sheffield United | 36,891 |
| replay | Sheffield United | 0 – 0 | Arsenal | 27,595 |
| Arsenal win 4-2 on penalties | Arsenal win 4-2 on penalties | Arsenal win 4-2 on penalties | Arsenal win 4-2 on penalties | Arsenal win 4-2 on penalties |
Question:
What shows for Tie no when Sheffield United was the Away team?
Answer:
8.0