user: Question: Name what was completed on 12 April 1934
Columns: ['Ship', 'Pennant number', 'Laid down', 'Launched', 'Completed']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Echo', 'H.23', '20 March 1933', '16 February 1934', '22 October 1934']
SQL:

assistant: SELECT "Completed" FROM "Table" WHERE "Launched" = '12 April 1934';