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

### Instruction:
What is the launch site of the delta iv rocket with an unknown date and a gps iif-10 satellite?

### Inputs:
table_name: table, columns: ['Date', 'Rocket', 'Type', 'Launch site', 'Satellite']

### Response:
SELECT Launch site FROM table WHERE Date = unknown AND Rocket = delta iv AND Satellite = gps iif-10