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 | Date |
| --- | --- | --- | --- | --- |
| 1 | Blackpool | 0–1 | Altrincham | 17 November 1984 |
| 2 | Darlington | 3–2 | Chester City | 17 November 1984 |
| 3 | Burnley | 9–0 | Penrith | 17 November 1984 |
| 4 | Preston North End | 4–3 | Bury | 17 November 1984 |
| 5 | Rochdale | 1–2 | Doncaster Rovers | 17 November 1984 |
| 6 | Weymouth | 0–3 | Millwall | 17 November 1984 |
| 7 | Gillingham | 2–1 | Windsor & Eton | 17 November 1984 |
| 8 | Northwich Victoria | 3–1 | Crewe Alexandra | 17 November 1984 |
| 9 | Macclesfield Town | 1–2 | Port Vale | 17 November 1984 |
| 10 | Lincoln City | 1–1 | Telford United | 17 November 1984 |
| Replay | Telford United | 2–1 | Lincoln City | 20 November 1984 |
| 11 | Wrexham | 0–2 | Wigan Athletic | 17 November 1984 |
| 12 | Stockport County | 1–2 | Walsall | 17 November 1984 |
| 13 | Bangor City | 1–1 | Tranmere Rovers | 17 November 1984 |
| Replay | Tranmere Rovers | 7–0 | Bangor City | 20 November 1984 |
| 14 | Brentford | 4–0 | Bishop's Stortford | 17 November 1984 |
| 15 | Bristol Rovers | 2–1 | King's Lynn | 17 November 1984 |
| 16 | Northampton Town | 2–2 | VS Rugby | 17 November 1984 |
| Replay | VS Rugby | 0–1 | Northampton Town | 21 November 1984 |
| 17 | Plymouth Argyle | 3–0 | Barnet | 17 November 1984 |
| 18 | Bradford City | 7–2 | Tow Law Town | 17 November 1984 |
| 19 | Hull City | 2–1 | Bolton Wanderers | 17 November 1984 |
| 20 | Southend United | 2–2 | Colchester United | 17 November 1984 |
| Replay | Colchester United | 3–2 | Southend United | 21 November 1984 |
| 21 | Exeter City | 2–2 | Enfield | 17 November 1984 |
| Replay | Enfield | 3–0 | Exeter City | 20 November 1984 |
| 22 | Mansfield Town | 2–1 | Rotherham United | 17 November 1984 |
| 23 | Halifax Town | 2–0 | Goole Town | 17 November 1984 |
| 24 | Newport County | 1–1 | Aldershot | 17 November 1984 |
| Replay | Aldershot | 4–0 | Newport County | 20 November 1984 |
| 25 | Torquay United | 2–0 | Yeovil Town | 17 November 1984 |
| 26 | York City | 2–0 | Newcastle Blue Star | 17 November 1984 |
| 27 | Metropolitan Police | 0–3 | Dartford | 17 November 1984 |
| 28 | Hereford United | 3–0 | Farnborough Town | 17 November 1984 |
| 29 | Kettering Town | 0–0 | Bournemouth | 17 November 1984 |
| Replay | Bournemouth | 3–2 | Kettering Town | 20 November 1984 |
| 30 | Barry Town | 1–2 | Reading | 17 November 1984 |
| 31 | Nuneaton Borough | 1–1 | Scunthorpe United | 17 November 1984 |
| Replay | Scunthorpe United | 2–1 | Nuneaton Borough | 20 November 1984 |
| 32 | Whitby Town | 1–3 | Chesterfield | 17 November 1984 |
| 33 | Buckingham Town | 0–2 | Orient | 17 November 1984 |
| 34 | Burton Albion | 2–0 | Staines Town | 17 November 1984 |
| 35 | Dagenham | 0–0 | Swindon Town | 19 November 1984 |
| Replay | Swindon Town | 1–2 | Dagenham | 26 November 1984 |
| 36 | Cambridge United | 0–2 | Peterborough United | 17 November 1984 |
| 37 | Swansea City | 1–1 | Bognor Regis Town | 17 November 1984 |
| Replay | Bognor Regis Town | 3–1 | Swansea City | 21 November 1984 |
| 38 | Frickley Athletic | 2–1 | Stalybridge Celtic | 17 November 1984 |
| 39 | Hartlepool United | 2–1 | Derby County | 17 November 1984 |
| 40 | Fisher Athletic | 0–1 | Bristol City | 17 November 1984 |
Question:
What is the tie no when scunthorpe united was the away team?
Answer:
31.0