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

### Instruction:
Who is every vacator with reason for change as resigned December 31, 1959?

### Inputs:
table_name: table, columns: ['District', 'Vacator', 'Reason for change', 'Successor', 'Date successor seated']

### Response:
SELECT Vacator FROM table WHERE Reason for change = Resigned December 31, 1959