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

### Instruction:
What date did the prime minister who entered office on 7 December 1916 leave office?

### Inputs:
table_name: table, columns: ['Name', 'Entered office', 'Left office', 'Political party', 'Monarchs served', 'Birth Place']

### Response:
SELECT Left office FROM table WHERE Entered office = 7 december 1916