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

### Instruction:
What is the vote number when immunity listed as David and reward is listed as none?

### Inputs:
table_name: table, columns: ['First air date', 'Reward', 'Immunity', 'Eliminated', 'Vote', 'Finish']

### Response:
SELECT Vote FROM table WHERE Immunity = David AND Reward = None