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 | Enfield | 2–0 | Hastings United | 21 November 1981 |
| 2 | Chesterfield | 4–1 | Preston North End | 21 November 1981 |
| 3 | Darlington | 2–2 | Carlisle United | 21 November 1981 |
| Replay | Carlisle United | 3–1 | Darlington | 24 November 1981 |
| 4 | Bournemouth | 1–0 | Reading | 21 November 1981 |
| 5 | Bristol City | 0–0 | Torquay United | 20 November 1981 |
| Replay | Torquay United | 1–2 | Bristol City | 25 November 1981 |
| 6 | Burnley | 0–0 | Runcorn | 21 November 1981 |
| Replay | Runcorn | 1–2 | Burnley | 24 November 1981 |
| 7 | Dorchester Town | 3–3 | Minehead | 21 November 1981 |
| Replay | Minehead | 0–4 | Dorchester Town | 23 November 1981 |
| 8 | Rochdale | 2–2 | Hull City | 21 November 1981 |
| Replay | Hull City | 2–2 | Rochdale | 24 November 1981 |
| Replay | Hull City | 1–0 | Rochdale | 30 November 1981 |
| 9 | Weymouth | 0–0 | Northampton Town | 21 November 1981 |
| Replay | Northampton Town | 6–2 | Weymouth | 24 November 1981 |
| 10 | Lincoln City | 2–2 | Port Vale | 21 November 1981 |
| Replay | Port Vale | 0–0 | Lincoln City | 30 November 1981 |
| Replay | Port Vale | 2–0 | Lincoln City | 2 December 1981 |
| 11 | Stafford Rangers | 1–2 | York City | 21 November 1981 |
| 12 | Swindon Town | 2–1 | Taunton Town | 21 November 1981 |
| 13 | Sheffield United | 2–2 | Altrincham | 21 November 1981 |
| Replay | Altrincham | 3–0 | Sheffield United | 23 November 1981 |
| 14 | Bishop Auckland | 4–1 | Nuneaton Borough | 21 November 1981 |
| 15 | Tranmere Rovers | 1–1 | Bury | 21 November 1981 |
| Replay | Bury | 3–1 | Tranmere Rovers | 24 November 1981 |
| 16 | Stockport County | 3–1 | Mossley F.C. | 21 November 1981 |
| 17 | Dover | 0–2 | Oxford United | 21 November 1981 |
| 18 | Brentford | 2–0 | Exeter City | 21 November 1981 |
| 19 | Bristol Rovers | 1–2 | Fulham | 21 November 1981 |
| 20 | Portsmouth | 1–1 | Millwall | 21 November 1981 |
| Replay | Millwall | 3–2 | Portsmouth | 25 November 1981 |
| 21 | Plymouth Argyle | 0–0 | Gillingham | 21 November 1981 |
| Replay | Gillingham | 1–0 | Plymouth Argyle | 24 November 1981 |
| 22 | Penrith | 1–0 | Chester | 21 November 1981 |
| 23 | Scunthorpe United | 1–0 | Bradford City | 21 November 1981 |
| 24 | Blyth Spartans | 1–2 | Walsall | 21 November 1981 |
| 25 | Bedford Town | 0–2 | Wimbledon | 21 November 1981 |
| 26 | Mansfield Town | 0–1 | Doncaster Rovers | 21 November 1981 |
| 27 | Halifax Town | 0–3 | Peterborough United | 21 November 1981 |
| 28 | Workington | 1–1 | Huddersfield Town | 21 November 1981 |
| Replay | Huddersfield Town | 5–0 | Workington | 24 November 1981 |
| 29 | Hereford United | 3–1 | Southend United | 21 November 1981 |
| 30 | Bishop's Stortford | 2–2 | Sutton United | 21 November 1981 |
| Replay | Sutton United | 2–1 | Bishop's Stortford | 24 November 1981 |
| 31 | Bideford | 1–2 | Barking | 21 November 1981 |
| 32 | Aldershot | 2–0 | Leytonstone/Ilford | 21 November 1981 |
| 33 | Horden CW | 0–1 | Blackpool | 21 November 1981 |
| 34 | Wigan Athletic | 2–2 | Hartlepool United | 21 November 1981 |
| Replay | Hartlepool United | 1–0 | Wigan Athletic | 25 November 1981 |
| 35 | Boston United | 0–1 | Kettering Town | 21 November 1981 |
| 36 | Harlow Town | 0–0 | Barnet | 21 November 1981 |
| Replay | Barnet | 1–0 | Harlow Town | 24 November 1981 |
| 37 | Colchester United | 2–0 | Newport County | 21 November 1981 |
| 38 | Hendon | 1–1 | Wycombe Wanderers | 21 November 1981 |
| Replay | Wycombe Wanderers | 2–0 | Hendon | 24 November 1981 |
| 39 | Dagenham | 2–2 | Yeovil Town | 21 November 1981 |
| Replay | Yeovil Town | 0–1 | Dagenham | 25 November 1981 |
| 40 | Willenhall Town | 0–1 | Crewe Alexandra | 21 November 1981 |
Question:
on what date was tie number 4?
Answer:
21 November 1981