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

### Instruction:
What album had a peak position of 6 and a certification of 3x platinum?

### Inputs:
table_name: table, columns: ['Rank', 'Artist', 'Album', 'Peak position', 'Sales', 'Certification']

### Response:
SELECT Album FROM table WHERE Certification = 3x platinum AND Peak position = 6