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

### Instruction:
Which Opposing Team has an Against smaller than 19, and a Date of 20/05/1979?

### Inputs:
table_name: table, columns: ['Opposing Team', 'Against', 'Date', 'Venue', 'Status']

### Response:
SELECT Opposing Team FROM table WHERE Against < 19 AND Date = 20/05/1979