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:
| Club              | Location     | Manager                                           | Stadium                    |   Capacity | Team captain       |
|:------------------|:-------------|:--------------------------------------------------|:---------------------------|-----------:|:-------------------|
| beroe             | stara zagora | ilian iliev category:articles with hcards         | beroe                      |      17800 | slavi zhekov       |
| botev             | plovdiv      | enrico piccioni category:articles with hcards     | hristo botev (plovdiv)     |      21000 | vasil vasilev      |
| cherno more       | varna        | velizar popov category:articles with hcards       | ticha                      |      12500 | georgi iliev       |
| chernomorets      | burgas       | krassimir balakov category:articles with hcards   | lazur                      |      18037 | cvetomir conkov    |
| cska              | sofia        | pavel dochev category:articles with hcards        | bulgarian army             |      22015 | todor yanchev      |
| levski            | sofia        | georgi ivanov category:articles with hcards       | georgi asparuhov           |      29200 | georgi petkov      |
| litex             | lovech       | angel chervenkov category:articles with hcards    | gradski stadion            |       7050 | ivelin popov       |
| lokomotiv mezdra  | mezdra       | voyn voynov category:articles with hcards         | lokomotiv (mezdra)         |       5000 | strati iliev       |
| lokomotiv plovdiv | plovdiv      | hristo bonev category:articles with hcards        | lokomotiv (plovdiv)        |      13800 | georgi mechedzhiev |
| lokomotiv sofia   | sofia        | dimitar vasev category:articles with hcards       | lokomotiv (sofia)          |      22000 | georgi markov      |
| minyor            | pernik       | anton velkov category:articles with hcards        | minyor                     |      12000 | ivaylo ivanov      |
| montana           | montana      | atanas dzhambazki category:articles with hcards   | ogosta                     |       8000 | ventsislav ivanov  |
| sliven 2000       | sliven       | dragoljub simonović category:articles with hcards | hadzhi dimitar             |      15000 | miroslav mindev    |
| pirin             | blagoevgrad  | stefan grozdanov category:articles with hcards    | hristo botev (blagoevgrad) |      11000 | georgi georgiev    |
| slavia            | sofia        | velislav vutsov category:articles with hcards     | ovcha kupel                |      18000 | yordan petkov      |

Question: Who's the captain of the team whose stadium is Gradski Stadion?

table_id: 1-23214833-1
label: SELECT "Team captain" FROM "table" WHERE "Stadium" = "Gradski Stadion"