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

### Instruction:
How many times did Niels Christian Kaldau win the men's single and Pi Hongyan win the women's single in the same year?

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

### Response:
SELECT COUNT Year FROM table WHERE Mens singles = Niels Christian Kaldau AND Womens singles = Pi Hongyan