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

### Instruction:
Which women was on the mixed doubles of tontowi ahmad lilyana natsir in 2011?

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

### Response:
SELECT Women's singles FROM table WHERE Mixed doubles = tontowi ahmad lilyana natsir AND Year = 2011