Task: NL2SQL (source dataset: WikiSQL)

Natural language to SQL, also known as NL2SQL, is the problem of generating a SQL query that can be executed on a input table, for a given natural language question.

You will be given an input table called "table" in the markdown format, as well as a question. Your task is to generate an SQL query that can be executed on the input table to answer the question.

Please ensure that the generated SQL only return relevant columns being specifically asked in the question (e.g., in SQL please don't return more than one columns in SELECT if only one column is needed to answer the given question, and similarly please refrain from using SELECT * unless the entire row is needed to answer the question).
 
When generating SQL code, please use the SQLite syntax to ensure that your SQL is executable on SQLite3. Use only columns that are present in the table, always use quotes around your column and table names (some column names have punctuation or special characters), and refer to the columns using the column-names exactly as they appear in the table, do not add or remove punctuation (underscore, slash, etc.)

No explanation, return the code only with the following markdown codeblock format : ```sql<SQL CODE>```. For example, ```sql
SELECT * FROM "table"
``` is a valid format.

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?

table_id: 2-17438338-1
label: SELECT "Tie no" FROM "table" WHERE "Away team" = "scunthorpe united"