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

### Instruction:
Who was the opponent on 11 August 1991 when the H/A was H?

### Inputs:
table_name: table, columns: ['Date', 'Opponents', 'H / A', 'Result F – A', 'Scorers']

### Response:
SELECT Opponents FROM table WHERE H / A = h AND Date = 11 august 1991