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

### Instruction:
In what location were the fatalities unknown for the Ju-52 aircraft?

### Inputs:
table_name: table, columns: ['Location', 'Aircraft', 'Tail number', 'Aircraft damage', 'Fatalities']

### Response:
SELECT Location FROM table WHERE Fatalities = unknown AND Aircraft = ju-52