user: Question: What is the launched date of the destroyer completed 25 February 1936?
Columns: ['Ship', 'Pennant number', 'Laid down', 'Launched', 'Completed']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Gallant', 'H59', '15 September 1934', '26 September 1935', '25 February 1936']
SQL:

assistant: SELECT "Launched" FROM "Table" WHERE "Completed" = '25 February 1936';