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 | IFK Västerås (D2) | 3–2 | IK Sleipner (D2) | 875 |
| 2 | Kramfors IF (N) | 2–4 (aet) | BK Kenty (D3) | 2,808 |
| 3 | Reymersholms IK (D2) | 5–2 | Åtvidabergs FF (D2) | 1,504 |
| 4 | Wifsta/Östrands IF (N) | 4–3 | Ludvika FfI (D2) | 974 |
| 5 | Råå IF (D3) | 3–2 | Sandvikens IF (D3) | 2,116 |
| 6 | Sandvikens AIK (D2) | 2–3 (aet) | Tidaholms GIF (D2) | 822 |
| 7 | Karlstads BIK (D2) | 2–5 | IF Friska Viljor (N) | 1,550 |
| 8 | Sandviks IK (N) | 2–3 | Surahammars IF (D2) |  |
Question:
which tie number did not have any attendance?
Answer:
8