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

### Instruction:
What was the stage when the winner was luis león sánchez?

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

### Response:
SELECT Stage FROM table WHERE Winner = Luis León Sánchez