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:
|   Episode | Title                                  | Story         | Adapted by      | Director              | Airdate          | Exists?   |
|----------:|:---------------------------------------|:--------------|:----------------|:----------------------|:-----------------|:----------|
|       101 | “no place like earth”                  | john wyndham  | stanley miller  | peter potter          | 4 october 1965   | yes       |
|       102 | “ the counterfeit man ”                | alan nourse   | philip broadley | george spenton-foster | 11 october 1965  | yes       |
|       103 | “stranger in the family”               | david campton | n/a             | alan bridges          | 18 october 1965  | yes       |
|       104 | “ the dead past ”                      | isaac asimov  | jeremy paul     | john gorrie           | 25 october 1965  | yes       |
|       105 | “ time in advance ”                    | william tenn  | paul erickson   | peter sasdy           | 1 november 1965  | yes       |
|       106 | “come buttercup, come daisy, come...?” | mike watts    | n/a             | paddy russell         | 8 november 1965  | yes       |
|       107 | “ sucker bait ”                        | isaac asimov  | meade roberts   | naomi capon           | 15 november 1965 | yes       |
|       108 | “the fox and the forest”               | ray bradbury  | terry nation    | robin midgeley        | 22 november 1965 | no        |
|       109 | “andover and the android”              | kate wilhelm  | bruce stewart   | alan cooke            | 29 november 1965 | no        |
|       110 | “some lapse of time”                   | john brunner  | leon griffiths  | ray jenkins           | 6 december 1965  | yes       |
|       111 | “thirteen to centaurus”                | j. g. ballard | stanley miller  | peter potter          | 13 december 1965 | yes       |

Question: What is the airdate when the director is george spenton-foster

table_id: 1-15739098-1
label: SELECT "Airdate" FROM "table" WHERE "Director" = "George Spenton-Foster"