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

### Instruction:
What is Opponent, when Date is 17 September 1998?

### Inputs:
table_name: table, columns: ['Date', 'Round', 'Opponent', 'Venue', 'Result', 'Attendance']

### Response:
SELECT Opponent FROM table WHERE Date = 17 september 1998