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

### Instruction:
Name the Date of mercedes, and a Circuit of elgin?

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

### Response:
SELECT Date FROM table WHERE Winning constructor = mercedes AND Circuit = elgin