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

### Instruction:
What zone has camp type D/S in area Bl9?

### Inputs:
table_name: table, columns: ['Area', 'Name', 'Zone', 'Group(s)', 'Parties', 'Max People', 'Camp Type']

### Response:
SELECT Zone FROM table WHERE Camp Type = d/s AND Area = bl9