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

### Instruction:
What is Surface, when Date is less than 1979, and when Opponent in the Final is "Bill Scanlon"?

### Inputs:
table_name: table, columns: ['Outcome', 'Date', 'Championship', 'Surface', 'Opponent in the final', 'Score in the final']

### Response:
SELECT Surface FROM table WHERE Date < 1979 AND Opponent in the final = bill scanlon