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:
| Launch Vehicle   | Launch date                  | Institutional authority   | Launch site              | Results         |
|:-----------------|:-----------------------------|:--------------------------|:-------------------------|:----------------|
| hatf-i           | october 20, 1989; 00:00 gmt  | suparco                   | sonmiani terminal        | success         |
| ghauri-i         | april 6, 1998; 04:30 gmt     | krl                       | tilla terminal test      | success         |
| shaheen-i        | january 15, 1999; 02:30 gmt  | paec                      | sonmiani terminal        | partial failure |
| ghauri-ii        | april 14, 1999; 05:35 gmt    | krl                       | tilla terminal test      | success         |
| shaheen-i        | april 15, 1999; 04:58 gmt    | paec                      | sonmiani terminal        | success         |
| ghauri-iii       | november 19, 2000; 00:00 gmt | krl                       | tilla terminal test      | ground failure  |
| ghauri-ii        | may 25, 2002 04:30 gmt       | krl                       | tilla terminal test      | success         |
| shaheen-i        | october 24, 2002; 02:30 gmt  | paec                      | jinnah naval test range  | success         |
| shaheen-i        | october 8, 2002              | paec                      | sonmiani terminal        | success         |
| shaheen-iii      | march 9, 2004                | suparco                   | tilla terminal test      | partial success |
| ghauri-i         | may 29, 2004                 | krl                       | tilla termial test       | success         |
| ghauri-i         | june 4, 2004                 | krl                       | tilla terminal test      | success         |
| ghauri-i         | october 12, 2004             | krl                       | tilla terminal test      | success         |
| shaheen-ii       | march 19, 2005               | ndc                       | sonmiani termial         | success         |
| ghauri-ii        | november 16, 2006            | krl                       | tilla terminal test      | success         |
| shaheen-i        | november 29, 2006            | paec                      | sonmiani terminal        | success         |
| shaheen-ii       | february 23, 2007            | ndc                       | sonmiani terminal        | success         |
| abdali-i         | march 3, 2007                | suparco                   | sonmiani terminal        | success         |
| ra'ad            | august 25, 2007              | paf                       | jinnal naval test range  | success         |
| shaheen-i        | january 25, 2008             | paec                      | sonmiani terminal        | success         |
| shaheen-ii       | april 19, 2008               | ndc                       | sonmiani terminal        | success         |
| shaheen-         | april 21, 2008               | ndc                       | jjinnah naval test range | success         |
| hatf-xi          | april 19, 2011               | ndc                       | tilla terminal test      | success         |

Question: Tell me the launch date with Institutional authority of ndc and launch vehicle of hatf-xi

table_id: 2-11869952-3
label: SELECT "Launch date" FROM "table" WHERE "Institutional authority" = "ndc" AND "Launch Vehicle" = "hatf-xi"