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

### Instruction:
Name the most stage for alejandro valverde and astana greg henderson

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

### Response:
SELECT MAX Stage FROM table WHERE General Classification = Alejandro Valverde AND Team Classification = Astana AND Winner = Greg Henderson