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

### Instruction:
what's the operational period with camp  sajmište

### Inputs:
table_name: table, columns: ['Camp', 'Estimated deaths', 'Operational', 'Occupied territory', 'Current country of location', 'Primary means for mass killings']

### Response:
SELECT Operational FROM table WHERE Camp = Sajmište