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

### Instruction:
when mixed doubles is zheng bo ma jin and womens singles is wang yihan, what was the tour?

### Inputs:
table_name: table, columns: ['Tour', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']

### Response:
SELECT Tour FROM table WHERE Mixed doubles = Zheng Bo Ma Jin AND Womens singles = Wang Yihan