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

### Instruction:
Which date has a Race Leader of hermann buse ( ger ), and a Stage of 5?

### Inputs:
table_name: table, columns: ['Stage', 'Date', 'Course', 'Distance', 'Winner', 'Race Leader']

### Response:
SELECT Date FROM table WHERE Race Leader = hermann buse ( ger ) AND Stage = 5