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

### Instruction:
What is the format for the album under the label, luaka bop, that had a catalog number of 3645 and dated after 1981?

### Inputs:
table_name: table, columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']

### Response:
SELECT Format FROM table WHERE Catalog = 3645 AND Date > 1981 AND Label = luaka bop