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

### Instruction:
What were the names of the mixed doubles pair for the year that Ralph Nichols played in the men's singles match?

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

### Response:
SELECT Mixed doubles FROM table WHERE Men's singles = ralph nichols