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

### Instruction:
what is the lowest apparent magnitude when the object type is spiral galaxy, the constellation is leo minor and the ngc number is more than 3021?

### Inputs:
table_name: table, columns: ['NGC number', 'Object type', 'Constellation', 'Right ascension ( J2000 )', 'Declination ( J2000 )', 'Apparent magnitude']

### Response:
SELECT MIN Apparent magnitude FROM table WHERE Object type = spiral galaxy AND Constellation = leo minor AND NGC number > 3021