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

### Instruction:
Which young classification has an aggressive rider of Tim Johnson?

### Inputs:
table_name: table, columns: ['Stage (Winner)', 'General Classification', 'Young Classification', 'Sprint Classification', 'Aggressive Rider', 'Team Classification']

### Response:
SELECT Young Classification FROM table WHERE Aggressive Rider = tim johnson