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

### Instruction:
Which Winning driver has a Winning constructor of mercedes, and a Name of elgin trophy?

### Inputs:
table_name: table, columns: ['Name', 'Circuit', 'Date', 'Winning driver', 'Winning constructor', 'Report']

### Response:
SELECT Winning driver FROM table WHERE Winning constructor = mercedes AND Name = elgin trophy