Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_31 (completed VARCHAR, laid_down VARCHAR)

### Question ###
when was the ship completed that was laid down on 23 march 1926?

### Accurate SQL ###

SELECT completed FROM table_name_31 WHERE laid_down = "23 march 1926"