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

### Instruction:
Before the Year 1972, what RIAA Sales Certification was awarded to the song that had a Billboard 200 Peak less than 18?

### Inputs:
table_name: table, columns: ['Year', 'Title', 'Label', 'RIAA Sales Certification', 'Billboard 200 Peak']

### Response:
SELECT RIAA Sales Certification FROM table WHERE Billboard 200 Peak < 18 AND Year < 1972