Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is Term Start, when Born-Died is Prime Ministers 1939 - 1943?

### Inputs:
table_name: table, columns: ['Name', 'Born-Died', 'Term start', 'Term end', 'Political Party']

### Response:
SELECT Term start FROM table WHERE Born-Died = prime ministers 1939 - 1943