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

### Instruction:
Who participated in the Mixed Doubles when Simon Santoso participated in the Men's Singles after 2008?

### Inputs:
table_name: table, columns: ['Year', "Men's singles", "Women's singles", "Women's doubles", 'Mixed doubles']

### Response:
SELECT Mixed doubles FROM table WHERE Men's singles = simon santoso AND Year > 2008