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

### Instruction:
What is the name of the 1st Party that has a 3rd Party of Unionist, and 2nd Member of Sir John Boyd-Orr?

### Inputs:
table_name: table, columns: ['Election', '1st Member', '1st Party', '2nd Member', '2nd Party', '3rd Member', '3rd Party']

### Response:
SELECT 1st Party FROM table WHERE 3rd Party = unionist AND 2nd Member = sir john boyd-orr