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:
| Date (dd.mm.yyyy)   | Soviet Unit   | Aircraft flown    | Enemy Aircraft               | Axis Unit                          |
|:--------------------|:--------------|:------------------|:-----------------------------|:-----------------------------------|
| 13.09.1942          | 437 iap       | yak-1 "white 02"  | ju.88                        | luftwaffe (**)                     |
| 13.09.1942          | 437 iap       | yak-1 "white 02"  | bf.109g-2 w.nr.13556 black 8 | 2./jg 53                           |
| 14.09.1942          | 437 iap       | yak-1 "white 02"  | bf.109                       | luftwaffe (**)                     |
| 27.09.1942          | 437 iap       | yak-1 "white 02"  | ju.88a-4 w.nr.3517           | 5./kg 76                           |
| 27.09.1942          | 437 iap       | yak-1 "white 02"  | bf.109g-2 w.nr.14221         | 4./jg 52. [ clarification needed ] |
| 11.02.1943          | 296 iap       | yak-1 "red 32"    | fw.190                       | luftwaffe (**)                     |
| 11.02.1943          | 296 iap       | yak-1 "red 32"    | ju.87d-3 w.nr.2948           | 5./stg 77                          |
| 1.03.1943           | 296 iap       | yak-1 "yellow 44" | fw.190                       | luftwaffe (**)                     |
| 22.03.1943          | 296 iap       | yak-1 "yellow 44" | bf.109g-4 "bh+xb"            | 9./jg 3                            |
| 22.03.1943          | 296 iap       | yak-1 "yellow 44" | bf.109g-2 "yellow 2"         | 9./jg 3                            |
| 5.05.1943           | 73 giap       | yak-1 "yellow 44" | bf.109                       | luftwaffe (**)                     |
| 7.05.1943           | 73 giap       | yak-1 "yellow 44" | bf.109                       | luftwaffe (**)                     |
| 16.07.1943          | 73 giap       | yak-1b "white 23" | bf.109g-6 w.nr.15204         | 5./jg 3                            |
| 16.07.1943          | 73 giap       | yak-1b "white 23" | bf.109g-? w.nr.?             | 5./jg 3                            |
| 19.07.1943          | 73 giap       | yak-1b "white 23" | bf.109g-6 w.nr.20005         | 5./jg 3                            |
| 21.07.1943          | 73 giap       | yak-1b "white 23" | bf.109                       | luftwaffe (**)                     |
| 1.08.1943           | 73 giap       | yak-1b "white 23" | bf.109g-6 w.nr.15852         | 2./jg 52                           |
| 1.08.1943           | 73 giap       | yak-1b "white 23" | bf.109g-6 w.nr.20423 white 3 | 1./jg 52                           |

Question: What was the aircraft flown when the axis unit was luftwaffe (**) and the enemy aircraft was ju.88?

table_id: 2-1826353-1
label: SELECT "Aircraft flown" FROM "table" WHERE "Axis Unit" = "luftwaffe (**)" AND "Enemy Aircraft" = "ju.88"