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

### Instruction:
How many different dates of issue are the for the coin with kumsusan memorial palace on the obverse?

### Inputs:
table_name: table, columns: ['Value', 'Dimensions', 'Main Color', 'Obverse', 'Reverse', 'Watermark', 'Date of issue']

### Response:
SELECT COUNT Date of issue FROM table WHERE Obverse = Kumsusan Memorial Palace